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  • Is is common to use the command pattern for property get/sets?

    - by k rey
    Suppose I have a controller class with a bunch of properties. Each time a property is changed, I would like to update the model. Now also suppose that I use the command pattern to perform model updates. Is it common to use command classes within property get and sets of the controller class or is there a better way? Here is an example of what I am currently using: class MyController { private int _myInt; public int MyInt { get { return _myInt; } set { MyCommand cmd = new MyCommand(); cmd.Argument = _myInt; cmd.Execute(); // Command object updates the model } } }

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  • C# output of running command prompt

    - by Kaushal Singh
    In this following code whenever I send any command like dir or anything this function get stuck in while loop... I want the output of the command prompt each time I send it command to execute without closing the process after the execution of command. public void shell(String cmd) { ProcessStartInfo PSI = new ProcessStartInfo(); PSI.FileName = "c:\\windows\\system32\\cmd.exe"; PSI.RedirectStandardInput = true; PSI.RedirectStandardOutput = true; PSI.RedirectStandardError = true; PSI.UseShellExecute = false; Process p = Process.Start(PSI); StreamWriter CSW = p.StandardInput; StreamReader CSR = p.StandardOutput; CSW.WriteLine(cmd); CSW.Flush(); while(!(CSR.EndOfStream)) { Console.WriteLine(CSR.ReadLine()); } CSR.Close(); }

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  • Ubuntu 12.04 wireless disabled even though the direct connectin (thru modem) is working fine

    - by user90841
    Need help with my newly installed Ubuntu 12.04 system (dual booting along with Win 7), even thoguh I can use internet using the modem and directly plugging it, the wireless network is disabled and it says firmware missing. I tried the following options: 1) checking to see if the wireless is disabled using the hot keys (F2 or Ctrl+F2, Fn + F2 keys), the wireless is working fine in Win 7 but not in Ubuntu. 2) I am able directly plug the laptop with the modem and able connect to Internet using Ubuntu. 3) From the top right hand menu bar, te Wireless networks options say "device not ready (firmware missing) and the Enable Wireless checkbox is checked. 4) tried the command "rfkill list" , it shows all are NOT blocked. 0: phy0: Wireless LAN soft blocked:no Hard blocked: no 1: dell-wifi: Wireless LAN soft blocked:no Hard blocked: no 2: dell-bluetooth: BlueTooth soft blocked:no Hard blocked: no 3: hci0 Bluetooth soft blocked:no Hard blocked: no 5) ifconfig command shows eth0 and lo (lcoalhost) up and running but the wlan0 option is not available to show unless I type ifconfig -a, when it shows wlan0 but its down. 6) The command lspci -vvnn | grep 14e4 shows 04:00.0 network Controller [0280]: Broadcom Corp BCM4312 802.11b/g LP-PHY [14e4:4315] {rev 01) 08:00.0 Ethernet Controller [0200]: Broadcom Corp Netlink BCM5784M Gigabit Ethernet PCIe [1434:1698] {rev 10) 7) The file /var/lib/NetworkManager/NetworkManager.state shows all options are true (networking enabled, wireless enabled, wwlanenabled and wimaxenabled all options are set to true). 8) 'additional drivers' in your Dash and/or Preferences do not bring up anything at all. 9) output for lshw -C network shows *-network DISABLED description : Wireless interface physical id: 4 logical name: wlan0 serial: 78:e4_00"43:b6:ab capabilities: ethernet physical wireless Configuration: broadcast=yes driver=b43 driverversion=3.2.0.29-generic-pae firmware=N/A link=no multicast= yes wireless=IEEE 802.11bg

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  • After installing Windows 8, boot hangs before BIOS setup

    - by Joe Purvis
    I have an Alienware M15x, 940MX processor, 16 GB RAM, 512GB M4 SSD, and I was running Win7 64bit. I backed up the disk and ran Win 8 setup. Setup appeared to go well through multiple reboots. After the last reboot, it simply stopped after POST at "Press F2 for bios setup". I have tried powering off, reducing RAM to one stick, removing MOS battery. Now, it gets to the screen with "Press F2 for setup" and "Press F12 for boot options". If I press F2, I get a single beep only. If I press F12, nothing. I cannot get into the BIOS to change boot options to boot from another disk and restore. I do have the latest BIOS. I am going to try replacing the CMOS battery, but I don't think that is likely to help. The computer has been fast and very reliable until now.

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  • Python performance: iteration and operations on nested lists

    - by J.J.
    Problem Hey folks. I'm looking for some advice on python performance. Some background on my problem: Given: A mesh of nodes of size (x,y) each with a value (0...255) starting at 0 A list of N input coordinates each at a specified location within the range (0...x, 0...y) Increment the value of the node at the input coordinate and the node's neighbors within range Z up to a maximum of 255. Neighbors beyond the mesh edge are ignored. (No wrapping) BASE CASE: A mesh of size 1024x1024 nodes, with 400 input coordinates and a range Z of 75 nodes. Processing should be O(x*y*Z*N). I expect x, y and Z to remain roughly around the values in the base case, but the number of input coordinates N could increase up to 100,000. My goal is to minimize processing time. Current results I have 2 current implementations: f1, f2 Running speed on my 2.26 GHz Intel Core 2 Duo with Python 2.6.1: f1: 2.9s f2: 1.8s f1 is the initial naive implementation: three nested for loops. f2 is replaces the inner for loop with a list comprehension. Code is included below for your perusal. Question How can I further reduce the processing time? I'd prefer sub-1.0s for the test parameters. Please, keep the recommendations to native Python. I know I can move to a third-party package such as numpy, but I'm trying to avoid any third party packages. Also, I've generated random input coordinates, and simplified the definition of the node value updates to keep our discussion simple. The specifics have to change slightly and are outside the scope of my question. thanks much! f1 is the initial naive implementation: three nested for loops. 2.9s def f1(x,y,n,z): rows = [] for i in range(x): rows.append([0 for i in xrange(y)]) for i in range(n): inputX, inputY = (int(x*random.random()), int(y*random.random())) topleft = (inputX - z, inputY - z) for i in xrange(max(0, topleft[0]), min(topleft[0]+(z*2), x)): for j in xrange(max(0, topleft[1]), min(topleft[1]+(z*2), y)): if rows[i][j] <= 255: rows[i][j] += 1 f2 is replaces the inner for loop with a list comprehension. 1.8s def f2(x,y,n,z): rows = [] for i in range(x): rows.append([0 for i in xrange(y)]) for i in range(n): inputX, inputY = (int(x*random.random()), int(y*random.random())) topleft = (inputX - z, inputY - z) for i in xrange(max(0, topleft[0]), min(topleft[0]+(z*2), x)): l = max(0, topleft[1]) r = min(topleft[1]+(z*2), y) rows[i][l:r] = [j+1 for j in rows[i][l:r] if j < 255]

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  • 12.04 upgrade broke grub? (not wubi related)

    - by kaare
    I just updated from 11.10 to 12.04, with no major problems (it took a while to get past a request to restart ssh, mysql and some other services, but I did no fiddling by myself, everything was done by the installer). However, after restarting, grub can't do anything. Picking the new linux installation (first entry), I just get error: no such partition error: no such partition error: no such partition and picking the recovery-version just gives 5 lines instead of 3. I have windows 7 installed on a different drive, and can run it by booting from that drive instead. Picking it from the grub menu gives the same error as above (can't remember how many lines, though). I'll be honest and say that I don't remember if win 7 could be booted from grub before the update, though. In short, nothing on the grub menu works. any solutions? The grub menu changed appearance - before it was on a purple background, small letters, now it's white-on-black, big letters, looking very basic. The original installation was from a usb-drive, and I hadn't heard about wubi until I started googling this problem, so I doubt there's any connection. I really hope there are some grub-savvy people out there :) EDIT: ok. so, I made a bootable usb, and am running from that right now. when I ran the bootinfoscript, it warned me that "gawk" could not be found, using "busybox awk" instead. This may lead to unreliable results. just so you know. The contents of RESULTS.txt are: Boot Info Script 0.61 [1 April 2012] ============================= Boot Info Summary: =============================== => Windows is installed in the MBR of /dev/sda. => Grub2 (v1.99) is installed in the MBR of /dev/sdb and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks for (,msdos3)/boot/grub on this drive. => Syslinux MBR (4.04 and higher) is installed in the MBR of /dev/sdc. sda1: __________________________________________ File system: vfat Boot sector type: Dell Utility: FAT16 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: /DELLBIO.BIN /DELLRMK.BIN /COMMAND.COM sda2: __________________________________________ File system: ntfs Boot sector type: Windows Vista/7: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sda3: __________________________________________ File system: ntfs Boot sector type: Windows Vista/7: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Windows 7 Boot files: /bootmgr /Boot/BCD /Windows/System32/winload.exe sda4: __________________________________________ File system: Extended Partition Boot sector type: - Boot sector info: sda5: __________________________________________ File system: vfat Boot sector type: Windows 7: FAT32 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Windows XP Boot files: /boot.ini /bootmgr /ntldr /NTDETECT.COM sdb1: __________________________________________ File system: ntfs Boot sector type: Windows XP: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sdb2: __________________________________________ File system: swap Boot sector type: - Boot sector info: sdb3: __________________________________________ File system: ext4 Boot sector type: Grub2 (v1.99) Boot sector info: Grub2 (v1.99) is installed in the boot sector of sdb3 and looks at sector 375893584 of the same hard drive for core.img. core.img is at this location and looks for (,msdos3)/boot/grub on this drive. Operating System: Ubuntu 12.04 LTS Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img sdb4: __________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Boot files: sdc1: __________________________________________ File system: ntfs Boot sector type: SYSLINUX 4.06 4.06-pre1 Boot sector info: Syslinux looks at sector 4649656 of /dev/sdc1 for its second stage. SYSLINUX is installed in the directory. The integrity check of the ADV area failed. No errors found in the Boot Parameter Block. Operating System: Boot files: /boot/grub/grub.cfg /syslinux/syslinux.cfg /ldlinux.sys ============================ Drive/Partition Info: ============================= Drive: sda _______________________________________ Disk /dev/sda: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sda1 63 240,974 240,912 de Dell Utility /dev/sda2 241,664 21,213,183 20,971,520 7 NTFS / exFAT / HPFS /dev/sda3 * 21,213,184 483,151,863 461,938,680 7 NTFS / exFAT / HPFS /dev/sda4 483,151,872 488,394,751 5,242,880 f W95 Extended (LBA) /dev/sda5 483,153,920 488,394,751 5,240,832 dd Dell Media Direct Drive: sdb _______________________________________ Disk /dev/sdb: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sdb1 63 345,886,749 345,886,687 7 NTFS / exFAT / HPFS /dev/sdb2 345,888,768 361,510,911 15,622,144 82 Linux swap / Solaris /dev/sdb3 * 361,510,912 390,807,786 29,296,875 83 Linux /dev/sdb4 390,809,600 488,394,751 97,585,152 83 Linux Drive: sdc _______________________________________ Disk /dev/sdc: 8015 MB, 8015282176 bytes 255 heads, 63 sectors/track, 974 cylinders, total 15654848 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sdc1 * 2,048 15,652,863 15,650,816 7 NTFS / exFAT / HPFS "blkid" output: ____________________________________ Device UUID TYPE LABEL /dev/loop0 squashfs /dev/sda1 07D8-0411 vfat DellUtility /dev/sda2 E2765BBC765B9061 ntfs RECOVERY /dev/sda3 98DC5E54DC5E2D2E ntfs OS /dev/sda5 7061-9DF5 vfat MEDIADIRECT /dev/sdb1 01CBBB4C3374C3B0 ntfs Data1 /dev/sdb2 1ca45f3f-f888-43d1-8137-02699597189a swap /dev/sdb3 6bc1b599-ad4b-403c-a155-a5bc81211f5e ext4 /dev/sdb4 58e2b257-8608-4b11-b20b-dc162bb80b62 ext4 /dev/sdc1 0C02B64402B63316 ntfs PENDRIVE ================================ Mount points: ================================= Device Mount_Point Type Options /dev/loop0 /rofs squashfs (ro,noatime) /dev/sdb4 /media/58e2b257-8608-4b11-b20b-dc162bb80b62 ext4 (rw,nosuid,nodev,uhelper=udisks) /dev/sdc1 /cdrom fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096) ================================ sda5/boot.ini: ================================ [boot loader] timeout=0 default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS [operating systems] multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Embedded" /fastdetect /KERNEL=NTOSBOOT.EXE /maxmem=1024 =========================== sdb3/boot/grub/grub.cfg: =========================== -------------------------------------------------------------------------------- # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=auto load_video insmod gfxterm insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="$1" if [ "$1" = "keep" ]; then set vt_handoff=vt.handoff=7 else set vt_handoff= fi } if [ ${recordfail} != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "$linux_gfx_mode" != "text" ]; then load_video; fi menuentry 'Ubuntu, with Linux 3.2.0-24-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e linux /boot/vmlinuz-3.2.0-24-generic root=UUID=6bc1b599-ad4b-403c-a155-a5bc81211f5e ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-24-generic } menuentry 'Ubuntu, with Linux 3.2.0-24-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e echo 'Loading Linux 3.2.0-24-generic ...' linux /boot/vmlinuz-3.2.0-24-generic root=UUID=6bc1b599-ad4b-403c-a155-a5bc81211f5e ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-24-generic } submenu "Previous Linux versions" { menuentry 'Ubuntu, with Linux 3.0.0-19-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e linux /boot/vmlinuz-3.0.0-19-generic root=UUID=6bc1b599-ad4b-403c-a155-a5bc81211f5e ro quiet splash $vt_handoff initrd /boot/initrd.img-3.0.0-19-generic } menuentry 'Ubuntu, with Linux 3.0.0-19-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e echo 'Loading Linux 3.0.0-19-generic ...' linux /boot/vmlinuz-3.0.0-19-generic root=UUID=6bc1b599-ad4b-403c-a155-a5bc81211f5e ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.0.0-19-generic } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(hd1,msdos3)' search --no-floppy --fs-uuid --set=root 6bc1b599-ad4b-403c-a155-a5bc81211f5e linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry "Windows 7 (loader) (on /dev/sda3)" --class windows --class os { insmod part_msdos insmod ntfs set root='(hd0,msdos3)' search --no-floppy --fs-uuid --set=root 98DC5E54DC5E2D2E chainloader +1 } menuentry "Microsoft Windows XP Embedded (on /dev/sda5)" --class windows --class os { insmod part_msdos insmod fat set root='(hd0,msdos5)' search --no-floppy --fs-uuid --set=root 7061-9DF5 drivemap -s (hd0) ${root} chainloader +1 } ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### =============================== sdb3/etc/fstab: ================================ # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sdb3 during installation UUID=6bc1b599-ad4b-403c-a155-a5bc81211f5e / ext4 errors=remount-ro 0 1 # /home was on /dev/sdb4 during installation UUID=58e2b257-8608-4b11-b20b-dc162bb80b62 /home ext4 defaults,user_xattr 0 2 # swap was on /dev/sdb2 during installation UUID=1ca45f3f-f888-43d1-8137-02699597189a none swap sw 0 0 =================== sdb3: Location of files loaded by Grub: ==================== GiB - GB File Fragment(s) = boot/grub/core.img 1 = boot/grub/grub.cfg 1 = boot/initrd.img-3.0.0-19-generic 2 = boot/initrd.img-3.2.0-24-generic 2 = boot/vmlinuz-3.0.0-19-generic 2 = boot/vmlinuz-3.2.0-24-generic 1 = vmlinuz 1 = vmlinuz.old 2 =========================== sdc1/boot/grub/grub.cfg: =========================== if loadfont /boot/grub/font.pf2 ; then set gfxmode=auto insmod efi_gop insmod efi_uga insmod gfxterm terminal_output gfxterm fi set menu_color_normal=white/black set menu_color_highlight=black/light-gray menuentry "Try Ubuntu without installing" { set gfxpayload=keep linux /casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash -- initrd /casper/initrd.lz } menuentry "Install Ubuntu" { set gfxpayload=keep linux /casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash -- initrd /casper/initrd.lz } menuentry "Check disc for defects" { set gfxpayload=keep linux /casper/vmlinuz boot=casper integrity-check quiet splash -- initrd /casper/initrd.lz } ========================= sdc1/syslinux/syslinux.cfg: ========================== # D-I config version 2.0 include menu.cfg default vesamenu.c32 prompt 0 timeout 50 # If you would like to use the new menu and be presented with the option to install or run from USB at startup, remove # from the following line. This line was commented out (by request of many) to allow the old menu to be presented and to enable booting straight into the Live Environment! # ui gfxboot bootlogo =================== sdc1: Location of files loaded by Grub: ==================== GiB - GB File Fragment(s) ?? = ?? boot/grub/grub.cfg 0 ================= sdc1: Location of files loaded by Syslinux: ================== GiB - GB File Fragment(s) ?? = ?? ldlinux.sys 1 ?? = ?? syslinux/chain.c32 1 ?? = ?? syslinux/gfxboot.c32 1 ?? = ?? syslinux/syslinux.cfg 0 ?? = ?? syslinux/vesamenu.c32 1 ============== sdc1: Version of COM32(R) files used by Syslinux: =============== syslinux/chain.c32 : COM32R module (v4.xx) syslinux/gfxboot.c32 : COM32R module (v4.xx) syslinux/vesamenu.c32 : COM32R module (v4.xx) =============================== StdErr Messages: =============================== xz: (stdin): Compressed data is corrupt xz: (stdin): Compressed data is corrupt awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in ./bootinfoscript: line 1646: [: 2.73495e+09: integer expression expected

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  • jrunscript as a cross platform scripting environment

    - by user12798506
    ?????????????????????????????????????????????????????????sh????????????UNIX???????????????????sh???????????????????????????????????????????Windows????????????????? sh??????????????find?grep?sed?awk???Windows??????????????????????????????????????????????????????????????????????????????????????????????Windows???Cygwin????????????sh??????Windows??????????????Cygwin????????????????????????????????????????????JDK?????jrunscript?????JavaScript???????????????????????1?????????jrunscript??????????????????? Windows???UNIX??????????????????????? find?grep?sed?awk?????????sh???????????????Windows Script Host??????? Java????????????? ??????????????????????????????????????????????????????????(?????????????????????????????????????????) ?????????????JDK 6??????????????????????????PC????????????????JDK 6?PC????????????????????????????????????JDK????????????????????????????????????????jrunscript?????????????????????????? ?????jrunscript????JavaScript?????????????????????????????????????????? 1) Windows???UNIX????????????????? ?????????????????????????????????????????JavaScript???mytool.js???????????????????????jrunscript???????????UNIX????sh???????Windows????bat????????????????????? mytool.sh (UNIX?): #!/bin/sh bindir=$(cd $(dirname $0) && pwd) case "`uname`" in CYGWIN*) bindir=`cygpath -w "$bindir"` ;; esac jrunscript "${bindir}/mytool.js" $* mytool.bat (Windows?): @echo off set bindir=%~dp0 jrunscript "%bindir%mytool.js" %* UNIX??sh????????Cygwin???????????????????????????????????????????js??????????????UNIX?Windows??????????????????????????????? 2) jrunscript??cat, cp, find?grep?????? jrunscript???UNIX?????????????????????????????????? jrunscript JavaScript built-in functions ????UNIX??sh?????????????????????UNIX?????????????????????????????????????????src??????????java????????????enum???????java?????????????????????????????????????????????? find('src', '.*.java', function(f) { grep('enum', f); }); ???????UNIX?????????????????????????????????????????????????????????????????????????????????????????cp(from, to)??????????????????????????????????????????UNIX??????????? $ cp -r src/* tmp/ ?????????????????????????????????????????find()???????cp -r????????·?????????????????????? function cpr(fromdir, todir, pattern) { if (pattern == undefined) { pattern = ".*"; } var frdir = pathToFile(fromdir).getCanonicalPath(); find(fromdir, pattern, function(f) { // relative dir of file f from 'fromdir'. var relative = f.getParentFile().getCanonicalPath().substring(frdir.length() + 1); var dstdir = pathToFile(todir + "/" + relative); if (!dstdir.exists()) { // Create the destination dir for file f. mkdirs(dstdir); } // Copy file f to 'dstdir'. cp(f, dstdir + "/" + f.getName()); }); } java?????I/O?API??Windows?????????????"/"??????????????????????????????UNIX?Windows?????????????? ????????????exec(cmd)?????????jar???????????????????????????????????????????? $ jrunscript js> exec("jar xvf example.jar") META-INF/ ?????????????µ???B META-INF/MANIFEST.MF ???W?J???????µ???B com/ ?????????????µ???B com/example/ ?????????????µ???B com/example/Bar.class ???W?J???????µ???B com/example/dummy/ ?????????????µ???B com/example/dummy/dummy.txt ?????o???????µ???B com/example/dummy.properties ?????o???????µ???B com/example/Foo.class ???W?J???????µ???B ???exec()?????????????????????????????????????????????????????????????????Windows????????????I/O??????????????????????????????????BAT????????? errmsg.bat: for /L %%i in (1,1,50) do echo "Error Message count = %%i" 1&2 jrunscript??exec()???????????????18??????????????????????????????????? C:\tmp>jrunscript -e "exec('errmsg.bat')" C:\tmp>for /L %i in (1 1 100) do echo "Error Message count = %i" 1>&2 C:\tmp>echo "Error Message count = 1" 1>&2 : C:\tmp>echo "Error Message count = 18" 1>&2 ? ??? ???????????exec()?????????????????????????????????????????????????????????????????DataInputStream???????????????????????? $ jrunscript js this["exec"].toString() function exec(cmd) { var process = java.lang.Runtime.getRuntime().exec(cmd); var inp = new DataInputStream(process.getInputStream()); var line = null; while ((line = inp.readLine()) != null) { println(line); } process.waitFor(); $exit = process.exitValue(); } ?????????????????????????????????????????????????????exec()???????????????exec()?????????????????????????????exec()??????? function exec(cmd) { var process = java.lang.Runtime.getRuntime().exec(cmd); var stdworker = new java.lang.Runnable( {run: function() { cat(process.getInputStream()); }}); var errworker = new java.lang.Runnable( {run: function() { cat(process.getErrorStream()); }}); new java.lang.Thread(stdworker).start(); new java.lang.Thread(errworker).start(); return proc.waitFor(); } ???????????????????cat()???????????cat()?InputStreamReader?????????????????????????????????????????????????? 3) JavaScript???????????????? JavaScript?Java???????????????????????JavaScript????????????Ruby?Groovy?Scala???????????????????????????????????????????????10MB?????????????????????????????????????JavaScript????????????????????KB?????????????MB?JAR??????????????????????????JRE?JDK?????????????????????????????????????????

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  • problem with radgrid in pageindexchange event

    - by user203127
    Hi, I Have radgrid in my page. When i turn off view state and in pageindexchanged event when click next page i am getting nothing. Simply a blank page. But when i turn on view state I am getting data in next pages. Is there any way to get the data. I cant turn on the view state due to performance issue. Please see the code below for the reference. .aspx <telerik:RadGrid ID="RadGrid1" OnSortCommand="RadGrid1_SortCommand" OnPageIndexChanged="RadGrid1_PageIndexChanged" AllowSorting="True" PageSize="20" ShowGroupPanel="True" AllowPaging="True" AllowMultiRowSelection="True" AllowFilteringByColumn="true" AutoGenerateColumns="false" EnableViewState="false" runat="server" GridLines="None" OnItemUpdated="RadGrid1_ItemUpdated" OnDataBound="RadGrid1_DataBound"> aspx.cs public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { LoadData(); } private void LoadData() { SqlConnection SqlConn = new SqlConnection("uid=tempuser;password=tempuser;data source=USWASHL10015\\SQLEXPRESS;database=CCOM;"); SqlCommand cmd = new SqlCommand(); cmd.Connection = SqlConn; cmd.CommandType = CommandType.StoredProcedure; cmd.CommandText = "usp_testing"; SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); da.Fill(ds); RadGrid1.DataSource = ds; RadGrid1.DataBind(); //RadGrid1.ClientSettings.AllowDragToGroup = true; } protected void RadGrid1_PageIndexChanged(object source, Telerik.Web.UI.GridPageChangedEventArgs e) { //RadGrid1.Rebind(); LoadData(); }

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  • SNIReadSync executing between 120-500 ms for a simple query. What do I look for?

    - by Mike
    Hi Stackoverflow, I am executing a simple query against SQL Server 2005: protected static void InitConnection(IDbCommand cmd) { cmd.CommandText = "set transaction isolation level read uncommitted "; cmd.ExecuteNonQuery(); } Whenever I profile with dotTrace 3.1, it claims that SNIReadSync method is taking between 100 - 500 ms. What sort of things do I need to be looking for in order to get this time down? Thanks!

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  • Yet another Subversion "Commit failed" MERGE of 'blabla': 200 OK

    - by marty3d
    Hi! I get the infamous "MERGE of 'whatever': 200 OK" whenever I try to commit using a post-commit hook on Windows (running the repository and Trac locally), and I'm going crazy. I've been looking all over for a day now, without finding any solutions. So here's how it's set up and what I've tried so far: Settings: Windows 7 (64-bit) VisualSVN Server TortoiseSVN Trac 0.11.6 I'm using the three standard scripts for post-commit on Windows. Everything works when I run post-commit.cmd from the command prompt with repo and changesetnumber as parameters. After extensive trouble-shooting, I found that if I remove the last line in trac-post-commit.cmd, Python "%~dp0\trac-post-commit-hook.py" -p "%TRAC_ENV%" -r "%REV%" -u "%AUTHOR%" -m "%LOG%", the Commit failed error goes away. Adding 1/0 (generating a division by zero error) in the python script doesn't show anything different. From the command prompt I get an error, though. Removing all code in the python script also makes the commit failed go away, so I guess the culprit is in trac-post-commit-hook.py. Perhaps if I could send the actual error to a log file, I could dig a little deeper, but I'm not sure how. post-commit.cmd: call %~dp0\trac-post-commit-hook.cmd %1 %2 trac-post-commit-hook.cmd: http://trac.edgewall.org/browser/trunk/contrib/trac-post-commit-hook?rev=920 Thank you so much, it would mean alot if someone could assist a little here! /Martin

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  • error: switch quantity not an integer

    - by nikeunltd
    I have researched my issue all over StackOverflow and multi-google links, and I am still confused. I figured the best thing for me is ask... Im creating a simple command line calculator. Here is my code so far: const std::string Calculator::SIN("sin"); const std::string Calculator::COS("cos"); const std::string Calculator::TAN("tan"); const std::string Calculator::LOG( "log" ); const std::string Calculator::LOG10( "log10" ); void Calculator::set_command( std::string cmd ) { for(unsigned i = 0; i < cmd.length(); i++) { cmd[i] = tolower(cmd[i]); } command = cmd; } bool Calculator::is_legal_command() const { switch(command) { case TAN: case SIN: case COS: case LOG: case LOG10: return true; break; default: return false; break; } } the error i get is: Calculator.cpp: In member function 'bool Calculator::is_trig_command() const': Calculator.cpp: error: switch quantity not an integer Calculator.cpp: error: 'Calculator::TAN' cannot appear in a constant-expression Calculator.cpp: error: 'Calculator::SIN' cannot appear in a constant-expression Calculator.cpp: error: 'Calculator::COS' cannot appear in a constant-expression The mighty internet, it says strings are allowed to be used in switch statements. Thanks everyone, I appreciate your help.

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  • Entity Framework: EntityCommand automatically parsing and determine parameter types?

    - by Torben Rahbek Koch
    Hi everybody, Pretty new to Entity Framework I must admit, but I simply cannot believe that there is no built-in solution for this problem. Let's say I create an EntityCommand: EntityCommand cmd = conn.CreateCommand(); cmd.CommandType = CommandType.Text; cmd.CommandText = commandText; And let's say the the commandText is something like this: SELECT sp.UserName, sp.Rights FROM EntityContext.Users as sp WHERE sp.UserName=@UserName Now it would be really neat if the Parameters collection of cmd could be automatically filled. The framework should obviously know the types etc. but I guess that's simply not how it works beneath. The problem is that the commandText is configurable on run-time, and I must show some GUI that asks for values of the parameters. Any idea on how this could be accomplished? Thanks for any ideas and for listening!

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  • How to Convert using of SqlLit to Simple SQL command in C#

    - by Nasser Hajloo
    I want to get start with DayPilot control I do not use SQLLite and this control documented based on SQLLite. I want to use SQL instead of SQL Lite so if you can, please do this for me. main site with samples http://www.daypilot.org/calendar-tutorial.html The database contains a single table with the following structure CREATE TABLE event ( id VARCHAR(50), name VARCHAR(50), eventstart DATETIME, eventend DATETIME); Loading Events private DataTable dbGetEvents(DateTime start, int days) { SQLiteDataAdapter da = new SQLiteDataAdapter("SELECT [id], [name], [eventstart], [eventend] FROM [event] WHERE NOT (([eventend] <= @start) OR ([eventstart] >= @end))", ConfigurationManager.ConnectionStrings["db"].ConnectionString); da.SelectCommand.Parameters.AddWithValue("start", start); da.SelectCommand.Parameters.AddWithValue("end", start.AddDays(days)); DataTable dt = new DataTable(); da.Fill(dt); return dt; } Update private void dbUpdateEvent(string id, DateTime start, DateTime end) { using (SQLiteConnection con = new SQLiteConnection(ConfigurationManager.ConnectionStrings["db"].ConnectionString)) { con.Open(); SQLiteCommand cmd = new SQLiteCommand("UPDATE [event] SET [eventstart] = @start, [eventend] = @end WHERE [id] = @id", con); cmd.Parameters.AddWithValue("id", id); cmd.Parameters.AddWithValue("start", start); cmd.Parameters.AddWithValue("end", end); cmd.ExecuteNonQuery(); } }

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  • Adapt beginner C# SQL Server INSERT example to work with my database

    - by Mike Bertelsen
    I have read TONS of tutorials, articles and whatever regarding my issue and honestly, due to my lack of experience I can't twist my fingers around this one so I hope some of you guys can help me out :) I am working on a project (simply to learn how to program so it's probably very basic), but I have this "News" page where I can update and delete data using a GridView. Now I would like to INSERT something into my database using 3 textboxes and 1 submit button. I have 3 rows that has to be inserted: Headline Date Content/the news itself. Which are stored under NyhedTB from the connectionstring: BoligStjernenConnectionString My query looks like this: INSERT INTO [NyhedTB] ([NyhedDato], [NyhedTitel], [NyhedTekst]) VALUES (@NyhedDato, @NyhedTitel, @NyhedTekst) I read on the internet that this code should do the magic for me (I will have to insert my own values ofc.): static void Insert() { try { string connectionString = "server=.;" + "initial catalog=employee;" + "user id=sa;" + "password=sa123"; using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); using (SqlCommand cmd = new SqlCommand("INSERT INTO EmployeeDetails VALUES(" + "@Id, @Name, @Address)", conn)) { cmd.Parameters.AddWithValue("@Id", 1); cmd.Parameters.AddWithValue("@Name", "Amal Hashim"); cmd.Parameters.AddWithValue("@Address", "Bangalore"); int rows = cmd.ExecuteNonQuery(); //rows number of record got inserted } } } catch (SqlException ex) { //Log exception //Display Error message } } I looked at this code and thought it should be easy enough but really, I can't figure it out.

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  • SQLITE problem in rowid

    - by Saurabh
    I am using SQLite C# library and as per my requirement, before going to add I am retreving the rowid of that table. It is working fine but hetting error when table is empty. Once we add any data(a row) then it’s working fine . mDbCon = GetConnection(); SQLiteCommand cmd = mDbCon.CreateCommand(); cmd.CommandText = " SELECT MAX(rowid) FROM " + “MYTABLE”; cmd.CommandType = CommandType.Text; mDbCon.Open(); SQLiteDataReader sqReader = cmd.ExecuteReader(); while (sqReader.Read()) { if ( sqReader.IsDBNull(0) ) { max = (Int32)sqReader.GetInt32(0); } } mDbCon.Close(); It’s throwing exception when table “MYTABLE” don’t have any data.

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  • Databind' is not a member of 'CrystalDecisions.Windows.Forms.CrystalReportViewer'

    - by Selom
    Hi, ive being trying to cope with this problem but still. I need your help. Im having the following error message: Databind' is not a member of 'CrystalDecisions.Windows.Forms.CrystalReportViewer' in my code: Dim rpt As New CrystalReport1() Dim da As New SQLiteDataAdapter Dim ds As New presbydbDataSet 'Dim cmd As New SQLiteCommand("SELECT personal_details.fn, training.training_level FROM personal_details INNER JOIN training ON Staff_ID WHERE personal_details.staff_ID='" + detailsFrm.Label13.Text + "'", conn) Dim cmd As New SQLiteCommand("SELECT * FROM personal_details WHERE personal_details.staff_ID='" + detailsFrm.Label13.Text + "'; SELECT * FROM training WHERE training.staff_ID='" + detailsFrm.Label13.Text + "'", conn) cmd.ExecuteNonQuery() da.SelectCommand = cmd da.Fill(ds) rpt.SetDataSource(ds) rpt.Subreports.Item("personal_detailsRpt").SetDataSource(ds.Tables("personal_details")) rpt.Subreports.Item("trainingRpt").SetDataSource(ds.Tables("training")) CrystalReportViewer1.ReportSource = rpt CrystalReportViewer1.DataBind() Im using vb.net and these are the imports Im using: Imports System.Data.SQLite Imports System.Configuration Imports CrystalDecisions.CrystalReports.Engine Imports CrystalDecisions.ReportAppServer Please how can I get rid of this error? Thanks for answering

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  • How do I work out IEEE 754 64-bit Floating Point Double Precision?

    - by yousef gassar
    enter code herehello i have done it in 32 but i could dont do it in 62bits please i need help I am stuck on this question and need help. I don't know how to work it out. This is the question. Below are two numbers represented in IEEE 754 64-bit Floating Point Double Precision, the bias of the signed exponent is -1023. Any particular real number ‘N’ represented in 64-bit form (i.e. with the following bit fields; 1-bit Sign, 11-bit Exponent, 52-bit Fraction) can be expressed in the form ±1.F2 × 2X by substituting the bit-field values using formula (IV.I): N = (-1) S × 1.F2 × 2(E – 1023) for 0 < E < 2047.........................….(IV.I) Where N= the number represented, S=Sign bit-value, E=Exponent=X +1023, F=Fraction or Mantissa are the values in the 1, 11 and 52-bit fields respectively in the IEEE 754 64-bit FP representation. Using formula (IV.I), express the 64-bit FP representation of each number as: (i) A binary number of the form:- ±1.F2 × 2X (ii) A decimal number of the form:- ±0.F10 × 10Y {limit F10 to 10 decimal places} Sign 0 1 Exponent 1000 0001 001 11 Fraction 1111 0111 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 52 Sign 1 1 Exponent 1000 0000 000 11 Fraction 1001 0010 0001 1111 1011 0101 0100 0100 0100 0010 1101 0001 1000 52 I know I have to use the formula for each of the these but how do I work it out? Is it like this? N = (-1) S × 1.F2 × 2(E – 1023) = 1 x 1.1111 0111 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 x 1000 0001 00111 (-1023)?

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  • Starting CLI application programmatically does not work depending on arguments

    - by Daniel Beck
    I try to start plink.exe (PuTTY Link, the command line utility/version of PuTTY) from a C# application to establish an SSH reverse tunnel, but it does no longer work as soon as I pass the correct parameters. What does that mean? The following works as expected: it opens a command line window, displays that I forgot to pass the password for the -pw argument quits, and shows the prompt. I know it got the arguments, since it specifically requests the one thing I did not provide. Uri uri = omitted; ProcessStartInfo info = new ProcessStartInfo(); info.FileName = "cmd"; info.Arguments = "/k \"C:\\Program Files (x86)\\PuTTY\\plink.exe\" -R 3389:" + uri.Host + ":" + uri.Port + " -N -l username -pw"; // TODO pwd Process p = Process.Start(info); I tried the same think with calling plink.exe directly instead of cmd.exe /k, but the window closes immediately, which is unfortunate for bug-hunting. BUT when I pass a password in the arguments, plink.exe displays the program help (showing available parameters) and quits: Uri uri = omitted; ProcessStartInfo info = new ProcessStartInfo(); info.FileName = "cmd"; info.Arguments = "/k \"C:\\Program Files (x86)\\PuTTY\\plink.exe\" -R 3389:" + uri.Host + ":" + uri.Port + " -N -l username -pw secretpassword"; Process p = Process.Start(info); No indication of missing parameters. Both the cmd /k and plink.exe variants do not work (the latter closes immediately, so no information regarding different behaviour). When I launch the application from the Windows 7 Start Menu launcher with the identical parameters, it opens a cmd.exe window and establishes the connection as requested. What's wrong? Is there a way plink.exe notices it's not running in a real shell? If yes, how can I circumvent it, like the Start Menu "prompt" does? I hope this question is right on SO, since it, though specifically for a single application, revolves around launching it successfully programmatically.

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  • Parameterized Queries /Without/ using queries.

    - by Aren B
    I've got a bit of a poor situation here. I'm stuck working with commerce server, which doesn't do a whole lot of sanitization/parameterization. I'm trying to build up my queries to prevent SQL Injection, however some things like the searches / where clause on the search object need to be built up, and there's no parameterized interface. Basically, I cannot parameterize, however I was hoping to be able to use the same engine to BUILD my query text if possible. Is there a way to do this, aside from writing my own parameterizing engine which will probably still not be as good as parameterized queries? Update: Example The where clause has to be built up as a sql query where clause essentially: CatalogSearch search = /// Create Search object from commerce server search.WhereClause = string.Format("[cy_list_price] > {0} AND [Hide] is not NULL AND [DateOfIntroduction] BETWEEN '{1}' AND '{2}'", 12.99m, DateTime.Now.AddDays(-2), DateTime.Now); *Above Example is how you refine the search, however we've done some testing, this string is NOT SANITIZED. This is where my problem lies, because any of those inputs in the .Format could be user input, and while i can clean up my input from text-boxes easily, I'm going to miss edge cases, it's just the nature of things. I do not have the option here to use a parameterized query because Commerce Server has some insane backwards logic in how it handles the extensible set of fields (schema) & the free-text search words are pre-compiled somewhere. This means I cannot go directly to the sql tables What i'd /love/ to see is something along the lines of: SqlCommand cmd = new SqlCommand("[cy_list_price] > @MinPrice AND [DateOfIntroduction] BETWEEN @StartDate AND @EndDate"); cmd.Parameters.AddWithValue("@MinPrice", 12.99m); cmd.Parameters.AddWithValue("@StartDate", DateTime.Now.AddDays(-2)); cmd.Parameters.AddWithValue("@EndDate", DateTime.Now); CatalogSearch search = /// constructor search.WhereClause = cmd.ToSqlString();

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  • c# reading integer fields from database, returning empty string when reading integer type field

    - by arnoldino
    what is wrong with this code? field="id"; table="MInvMonth"; condition="machine_id=37"; public static String getConditionedField(String field, String table, String condition) try { if (cmd == null) getConnection(); cmd.CommandText = "Select " + field + " from " + table + " where " + condition; SQLiteDataReader reader = cmd.ExecuteReader(); if (reader.HasRows==true) { reader.Read(); string s = reader[0].ToString(); // return first element reader.Close(); return s; } reader.Close(); return null; } catch (Exception e) { MessageBox.Show("Caught exception: " + e.Message+"|"+cmd.CommandText); return null; } I checked the sql statement, it turns the right value. why can't I read it? the returnvalue is "".

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  • Does DataAdapter.Fill() close its connection when an Exception is thrown?

    - by motto
    Hi, I am using ADO.NET (.NET 1.1) in a legacy app. I know that DataAdapter.Fill() opens and closes connections if the connection hasn't been opened manually before it's given to the DataAdapter. My question: Does it also close the connection if the .Fill() causes an Exception? (due to SQL Server cannot be reached, or whatever). Does it leak a connection or does it have a built-in Finally-clause to make sure the connection is being closed. Code Example: Dim cmd As New SqlCommand Dim da As New SqlDataAdapter Dim ds As New DataSet cmd.Connection = New SqlConnection(strConnection) cmd.CommandText = strSQL da.SelectCommand = cmd da.Fill(ds)

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  • Autocomplet extender control in ajax (asp.net)?

    - by Surya sasidhar
    hi, i am using autocomplete extender in my application but it is not working. this is my code.. <form id="form1" runat="server"> <asp:scriptmanager ID="Scriptmanager1" runat="server"></asp:scriptmanager> <br /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <div> <cc1:AutoCompleteExtender TargetControlID="TextBox1" MinimumPrefixLength="1" ServiceMethod="GetVideoTitles" CompletionSetCount="10" ServicePath="Myservices.asmx" ID="AutoCompleteExtender1" runat="server"> </cc1:AutoCompleteExtender> </div> </form> this is webservice method public string[] GetVideoTitles(string prefixText) { SqlConnection con = new SqlConnection(@"Data Source=SERVER5\SQLserver2005;Initial Catalog=tpvnew;User ID=xx;Password=525"); con.Open(); SqlCommand cmd = new SqlCommand("video_videotitles", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("@prefixText", SqlDbType.VarChar, 50); cmd.Parameters["@prefixText"].Value = prefixText; SqlDataAdapter da = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); da.Fill(dt); string[] items = new string[dt.Rows.Count]; int i = 0; foreach (DataRow dr in dt.Rows) { items.SetValue(dr["videotitle"].ToString(), i); i++; } return items; }

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  • Mercurial 1.5 pager on Windows

    - by alexandrul
    I'm trying to set the pager used for Mercurial but the output is empty, even if I specify the command in the [pager] section or as the PAGER environment variable. I noticed that the command provided is launched with cmd.exe. Is this the cause of empty output, and if yes, what is the right syntax? Environment: Mercurial 1.5, Mecurial 1.4.3 hgrc: [extensions] pager = [pager] pager = d:\tools\less\less.exe Sample command lines (from Process Explorer): hg diff c:\windows\system32\cmd.exe /c "d:\tools\less\less.exe 2> NUL:" d:\tools\less\less.exe UPDATE In pager.py, by replacing: sys.stderr = sys.stdout = util.popen(p, "wb") with sys.stderr = sys.stdout = subprocess.Popen(p, stdin = subprocess.PIPE, shell=False).stdin I managed to obtain the desired output for the hg status and diff. BUT, I'm sure it's wrong (or at least incomplete), and I have no control over the pager app (less.exe): the output is shown in the cmd.exe window, I can see the less prompt (:) but any further input is fed into cmd.exe. It seems that the pager app is still active in the background: after typing exit in the cmd.exe window, I have control over the pager app, and I can terminate it normally. Also, it makes no difference what I'm choosing as a pager app (more is behaving the same). UPDATE 2 Issue1677 - [PATCH] pager for "hg help" output on windows

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  • Socket server with multiple clients, sending messages to many clients without hurting liveliness

    - by Karl Johanson
    I have a small socket server, and I need to distribute various messages from client-to-client depending on different conditionals. However I think I have a small problem with livelyness in my current code, and is there anything wrong in my approach: public class CuClient extends Thread { Socket socket = null; ObjectOutputStream out; ObjectInputStream in; CuGroup group; public CuClient(Socket s, CuGroup g) { this.socket = s; this.group = g; out = new ObjectOutputStream(this.socket.getOutputStream()); out.flush(); in = new ObjectInputStream(this.socket.getInputStream()); } @Override public void run() { String cmd = ""; try { while (!cmd.equals("client shutdown")) { cmd = (String) in.readObject(); this.group.broadcastToGroup(this, cmd); } out.close(); in.close(); socket.close(); } catch (Exception e) { System.out.println(this.getName()); e.printStackTrace(); } } public void sendToClient(String msg) { try { this.out.writeObject(msg); this.out.flush(); } catch (IOException ex) { } } And my CuGroup: public class CuGroup { private Vector<CuClient> clients = new Vector<CuClient>(); public void addClient(CuClient c) { this.clients.add(c); } void broadcastToGroup(CuClient clientName, String cmd) { Iterator it = this.clients.iterator(); while (it.hasNext()) { CuClient cu = (CuClient)it.next(); cu.sendToClient(cmd); } } } And my main-class: public class SmallServer { public static final Vector<CuClient> clients = new Vector<CuClient>(10); public static boolean serverRunning = true; private ServerSocket serverSocket; private CuGroup group = new CuGroup(); public void body() { try { this.serverSocket = new ServerSocket(1337, 20); System.out.println("Waiting for clients\n"); do { Socket s = this.serverSocket.accept(); CuClient t = new CuClient(s,group); System.out.println("SERVER: " + s.getInetAddress() + " is connected!\n"); t.start(); } while (this.serverRunning); } catch (IOException ex) { ex.printStackTrace(); } } public static void main(String[] args) { System.out.println("Server"); SmallServer server = new SmallServer(); server.body(); } } Consider the example with many more groups, maybe a Collection of groups. If they all synchronize on a single Object, I don't think my server will be very fast. I there a pattern or something that can help my liveliness?

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