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  • How to name a method that both performs a task and returns a boolean as a status?

    - by Limbo Exile
    If there is a method bool DoStuff() { try { // doing stuff... return true; } catch (Exception ex) { return false; } } should it rather be called IsStuffDone()? Both names could be misinterpreted by the user: If the name is DoStuff() why does it return a boolean? If the name is IsStuffDone() it is not clear whether the method performs a task or only checks its result. Is there a convention for this case? Or an alternative approach, as this one is considered flawed? For example in languages that have output parameters, like C#, a boolean status variable could be passed to the method as one and the method's return type would be void.

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  • Convert Currencies Dynamically using PHP, Google and cURL [closed]

    - by LizO
    I want to be able to allow users to dynamically change the currency of the products prices in my webstore, right there on the page. For example, 300 USD will change to 221.61 EUR when the user selects Euros from a dropdown. I found a few sites with PHP code for a calculator/input format (user inputs value and converted currency is output.) http://www.chazzuka.com/blog/?p=104 http://www.pixel2life.com/publish/tutorials/1166/currency_conversion_in_php/page-3/ I was hoping someone could help me figure out how to modify the PHP script. Thanks in advance.

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  • Asterisk not playing custom sounds on Ubuntu Server 11.04

    - by jochy2525
    I've installed Asterisk on my Ubuntu Server, all works fine, excepts playing the custom sounds. Asterisk sounds work, but this file I've uploaded does not play (on other servers it works, it is a .WAV PCM 16bit 8000). Here is some log output: [Feb 6 22:55:45] WARNING[11045] file.c: File custom/sohoitsoluciones does not exist in any format [Feb 6 22:55:45] WARNING[11045] file.c: Unable to open custom/sohoitsoluciones (format 0x4 (ulaw)): No such file or directory [Feb 6 22:55:45] WARNING[11045] app_playback.c: ast_streamfile failed on SIP/Out4903-0000001d for custom/sohoitsoluciones How can I get Asterisk to play a custom sound?

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  • How do I do a mail merge that includes images?

    - by Ian Ringrose
    I am trying to find out the practicalities of doing a mail merge when each “record” to be merged on includes some images. I need to: print letters And envelopes Both the letters and the envelopes have: Fixed text Fixed images Text that come from the mail merge record Images that come from the mail merge record I don’t know if all images will be the same size for every record, so a bit of simple “on the fly” automatic formatting may be needed . I need to be able to repeat a single item if I get a problem (e.g when folding the letter). What problems am I likely to have? Is Word 2007 up to this sort of mail merging, or should I be looking at a report writing tool? How do I restart a print run after a printer jam etc? What format should I store the “records” and there images in? E.g Can standard software cope with images that are stored in separate files named after the “CustomerId” that is in the “record” (I can write custom software if needed, but would rather use standard “of-the-shelf” software for the printing, I am planning on custom software for the data creation, so can output in whatever format is needed)

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  • Where should I store and verify files manipulated by an app

    - by Alan W. Smith
    I'm working on a little Ruby script to move screenshots while renaming them based on a specific convention. I'll be writing tests to confirm the behavior. Ruby has lots of conventions for where to store files (e.g. the "spec" and "features" directories for RSpec and Cucumber, respectively), but I'm not finding best practices for storing files that will be acted upon by the tests. The same goes for a destination for the final copies of the files. So, the question in two parts is: Where should I store files that the test cases will use for a source input. Where should tests that need to write output files send them to.

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  • Regex to String generation

    - by Mifmif
    Let's say that we have a regex and an index i , if we suppose that the set of string that match our regex are sorted in a lexicographical order, how could we get the i element of this list ? Edit : I added this simple example for more explanation : input : regex="[a-c]{1,2}"; index=4; in this case the ordered list of string that matches this regex contains those elements : a aa ab ac b ba bb bc c ca cb cc output : the 4th element which is ac ps: it's known that the string list that match the regex have infinite element, this doesn't have an impact on the proccess of extracting the element in the given index.

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  • Weird issue with iptables redirection

    - by skypemesm
    I am trying to redirect all incoming traffic on UDP port 5060 to port 56790, and all outgoing traffic from 5060 to the port 56789. I used these iptables rules: iptables -t nat -I PREROUTING -p udp ! -s localhost --dport 5060 -j REDIRECT --to-port 56790 iptables -t nat -I OUTPUT -p udp ! -s localhost --sport 5060 -j REDIRECT --to-port 56789 I listen on both ports using RAW SOCKETS after setting the interface to PROMISCUOUS mode using ioctl. I see packets ONLY on 56789 i.e.SENDING side, and I do not see any packets on 56790, while wireshark shows that many packets are delivered to port 5060. Why would this happen? Any ideas? Do you think it's a problem with iptables rules or something to do with raw sockets? [This is ubuntu 10.04 and iptables v1.4.4]

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  • Rehosting content from another server

    - by Lana_M
    We have a set of static pages that will augment a customer's existing site. The pages will not reside on the customer's servers for logistical reasons and because we need to maintain control of the content. The plan is for the customer to set up a mod_rewrite rule that will funnel certain types of URLs to a single server-side handler script that will grab the appropriate file from a CDN and just output its content. This illustrates the approach: <?php echo(file_get_contents(str_replace($customer_host, $cdn_host, $_SERVER['REQUEST_URI']))); ?> Can anyone think of pitfalls or offer up a different approach? Is there some way to circumvent a script altogether?

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  • Upload Recordings Of The Problem To Your SR

    - by jhpierce
    Do you find yourself trying several times to explain a problem in a Service Request? Does the support engineer ask more than once for clarification? If so, you might be interested in DITO -- Demo It To Oracle. DITO uses CamStudio (free download!) to record the exact nature of the problem, and upload the output to your SR. The following articles provide more details: Working with Support - MOSSOS (Doc ID 1265130.1) "Demo It To Oracle" (DITO) - CamStudio Help ( Doc ID 11.1) Why take up valuable time first explaining the problem, then trying to get a web conference setup to show exactly what is going on? The next time you file an SR, try including a recording showing exactly which application is failing, where it is failing, and what it looks like when it fails.

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  • ubuntu 11, maximum resolution is a low 1024 x 768

    - by djturbojp7
    I just installed ubuntu 11 and the maximum resolution that it will let me set it at is 1024 x 768. My graphics are onboard, its the intel 82845g. Trying to increase the resolution and support the video more smoothly. UPDATE: user1@pc1:~$ xrandr | grep maximum Screen 0: minimum 320 x 200, current 1024 x 768, maximum 2048 x 2048 user1@pc1:~$ gtf 1280 1024 59.9 # 1280x1024 @ 59.90 Hz (GTF) hsync: 63.49 kHz; pclk: 108.70 MHz Modeline "1280x1024_59.90" 108.70 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync user1@pc1:~$ xrandr --newmode "1280x1024_59.90" 108.70 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync X Error of failed request: BadName (named color or font does not exist) Major opcode of failed request: 149 (RANDR) Minor opcode of failed request: 16 (RRCreateMode) Serial number of failed request: 20 Current serial number in output stream: 20 user1@pc1:~$

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  • Is it bad form to stage a function's steps in intermediate variables (let bindings)?

    - by octopusgrabbus
    I find I tend to need intermediate variables. In Clojure that's in the form of let bindings, like cmp-result-1 and cmp-result-2 in the following function. (defn str-cmp "Takes two strings and compares them. Returns the string if a match; and nil if not." [str-1 str-2 start-pos substr-len] (let [cmp-result-1 (subs str-1 start-pos substr-len) cmp-result-2 (subs str-2 start-pos substr-len)] (compare cmp-result-1 cmp-result-2))) I could re-write this function without them, but to me, the function's purpose looks clearer. I tend to do this quite in a bit in my main, and that is primarily for debugging purposes, so I can pass a variable to print out intermediate output. Is this bad form, and, if so, why? Thanks.

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  • How to connect to the internet via command line or graphical utility given I can't click at the top of the screen?

    - by Ben
    My Ubuntu 12.04 installation has an input problem resulting preventing me from clicking near the top of the screen. That is, there is an unclickable area, circa 60 pixels high and stretching all the way across the screen. I will ask about this in a later question. For now, I would just like to be able to connect to the internet, given this limitation. I am able to access the network connections application by hitting the super key and typing "network connections". There is a LAN and a wireless network available. The network icon in the bar at the top of the screen shows an empty wedge, which I suppose means that wireless is off. I've attached the cable for the Ethernet connection, but it does not seem to have connected automatically. How can I figure out what's going on? (I'll happily edit in the output of any relevant terminal commands.) Thank you.

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  • Why isn't garbage collection being activated in my code? [migrated]

    - by Netmoon
    I have a foreach statement in my code, where each iteration calculates huge amounts of data and goes to the next iteration. I run this code, but when I read the log, I see there's a memory leak error. PHP.net says when this happens, using gc_enabled() is a good way to handle this. I've added these lines to last line of the foreach block: echo "Check GC enabled : " . gc_enabled(); echo "Number of affected cycles : " . gc_collect_cycles(); And this is the output: Check GC enabled : 1 Number of affected cycles : 0 Why do cycles exist, but the affected cycles is 0?

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  • Restoring MBR, partition table, and boot sector of memory card without data loss ("USBC")

    - by Synetech
    Abstract I have a FAT32 memory card that when inserted into a computer causes Windows to prompt to format it. The card is definitely not supposed to be blank and has a bunch of files on it. Symptoms Using a hex-editor/disk-viewer, I examined the card and found that several sectors/clusters have been overwritten with something that has a signature of USBC at the start of the sector. Specifically, the master boot record (and partition table) is gone (hence Windows thinking the card is blank and needing to be formatted), as are the boot sectors (they have the USBC signature and a volume label of NO NAME and partition type of FAT32). Fortunately, it looks like both copies of the FAT are almost entirely intact (a few FAT entries at the start of a cluster here and there seem to be overwritten by USBC). The root directory is also nearly intact—I can see the volume label entry and subdirectory listings, but one sector is overwritten. (There are no more instances of USBC after the last one in the FAT2.) Hypothesis These observations seem to indicate some sort of virus that erases a few key filesystem structures, and then overwrites a few extra sectors here and there. Googling it seems to corroborate the idea of a virus, except that others report a file called USBC which does not apply here, and in fact, could not be possible since there is no filesystem to even see files. I cannot find any information about a virus with these symptoms, nor a removal tool. (I can't help but wonder if it is actually due to an autorun virus prevention tool.) Question I can likely fix the FAT corruption since they are mostly contiguous chains and maybe even the lost sector of the root directory, but does anyone know of a convenient way to restore or (re)create the MBR/partition table and boot sectors (without formatting or overwriting the data)?

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  • How to charge an iPad?

    - by ibo.ezhe
    Trying to charge my iPad with my Ubuntu 11.10 laptop (HP ProBook 5320m). It connects and I am able to download photos for instance. However battery doesn't charge at all. Does anyone know how to fix this? Output of lspci | grep USB 00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 02) 00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 02) 00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 02) 00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 02) 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 02) 00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 02) 00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 02)

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  • Is deserializing complex objects instead of creating them a good idea, in test setup?

    - by Chris Bye
    I'm writing tests for a component that takes very complex objects as input. These tests are mixes of tests against already existing components, and test-first tests for new features. Instead of re-creating my input objects (this would be a large chunk of code) or reading one from our data store, I had the thought to serialize a live instance of one of these objects, and just deserialize it into test setup. I can't decide if this is a reasonable idea that will save effort in long run, or whether it's the worst idea that I've ever had, causing those that will maintain this code will hunt me down as soon as they read it. Is deserialization of inputs a valid means of test setup in some cases? To give a sense of scale of what I'm dealing with, the size of serialization output for one of these input objects is 93KB. Obtained by, in C#: new BinaryFormatter().Serialize((Stream)fileStream, myObject);

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  • Web-based data generator

    - by John Paul Cook
    One of my coworkers told me about Mockaroo , a web-based data generator. I needed some test data for upcoming blog posts, so I decided to give it a try. It’s pretty good. I had to use Firefox because of problems running Mockaroo on Internet Explorer 11. Using the defaults except for changing the format to SQL, it generated output that looked something like the following. Mockaroo is so good that it generates fake data that could accidentally be real, such as email addresses. Consequently, I edited...(read more)

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  • Change administrator username

    - by Fazlan
    I have accidentally typed my name wrong when I created the administrator account. Although I managed to change the user name at the login screen, I am unable to rename the /home/oldusername to /home/newusername. I tried most of the online tutorials, and it failed. The code I tried was this: usermod -l newusername -m -d /home/newusername oldusername But the output is: cannot lock /etc/passwd; try again later. How can I fix the issue and change the folder to newusername and expect all the applications to work as before?

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  • How to apply a filter to the screen of a running program?

    - by Shahbaz
    The idea is to take old games without modifying them, but have the graphics card apply a series of filters to their output before sending them to the monitor. A very crude example would be to take a game that has a resolution of 640x480 and do: Increase the resolution to 1280x960 Apply a blur (low pass filter) Apply a sharpen (1 + high pass filter) These steps may not necessarily be the best to improve the visuals of an old game, but there are a lot of techniques that are well-known in image processing for this purpose. The question is, do the (NVidia) graphics cards give the ability to load a program that modifies the screen before sending it to the monitor? If so, how are they called and what terminology should I use to search? I would be comfortable with doing the programming myself if this ability is part of a library. Also, would the solution be different between Windows and Linux? If so, either is fine, since most of the games are probably runnable by wine.

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  • Bluetooth device paired and connected (no sound)

    - by Michael
    I've got a Bluetooth headset which works great in both Windows 8 and Android 4.2 however on Ubuntu (13.10) it just doesn't seem to work. I installed Blueman, it paired and connected successfully when I tried Audio sink but it still doesn't show up in my Sound Settings nor PulseAudio which I installed and tried. All there is in my Sound Settings is "Analog Output". I tried several fix like changing and adding things in /etc/bluetooth/audio.conf without any success. I've restarted the bluetooth service several times in the process as well. Let me know if you need more information from me and my system. Kind regards, Michael.

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  • How can I fix my problems with fonts in Firefox?

    - by snostorm
    Ever since I reinstalled Ubuntu a few hours ago, I've experienced major visual artifacts with smaller font sizes in Firefox. The fonts end up looking like this: Or even like this: This only occurs in Firefox; other applications are unaffected. It also occurred on the LiveUSB I used for installation, making me suspect a hardware or driver issue. The output of lshw on my computer is here: http://pastebin.com/LnSt6veT. Any idea what might be causing this, or how I can fix it? ... and "Use Google Chrome" is not a valid answer. ;)

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  • New PC: win7 install issues with 2x3TB in RAID1

    - by goober
    Background / Components Not sure what I've done wrong. Built one PC before successfully in a similar way but this one seems to be struggling. I have the following components: ASUS P8Z68-V/Pro Gen 3 (updated to latest firmware) 16GB (2x8GB) RAM corsair hx850 power supply 2x3TB drives on the intel z68 controller 1x128GB SSD on the Marvel controller sapphire 7950 The problem I set up my 3 TB disks in RAID1 controller appears to recognize them fine during boot as one 2.7TB raid1 volume windows setup sees two disks, both 746 GB, but will only let me install to one and appears to work fine. windows appears to install fine after installer reboots, I receive "windows failed to start" error referencing code 0xc000000e and "\Windows\system32\winload.exe every time I do an install, a new additional "win7" entry is added to the boot menu; all lead to this error. What I've tried: updated the BIOS to the latest firmware attempted to repair the install tried clearing / removing raid / re-raiding drives tried formatting the drives during install attempted to clear the menu Of entries (can't figure out how to do that) No matter how many times I destroy the raid array, format the disks, etc. the boot entries keep piling up. Any idea where I'm going wrong?

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  • How to fix slow wireless with Intel 4965 AGN? [closed]

    - by mikewhatever
    Possible Duplicate: Slow wireless with an Intel 4965 We run Ubuntu 12.04, 32bit, with the current kernel 3.2.27-generic on an MSI EX700. I've already added the 11n_disable=1 tweek, without whcih, wireless has been unusable. Now, it works OK, but speedtest shows: Windows XP - down 11.68mbps, up 2.07mbps Ubuntu 12.04 - down 2.06mbps up 2.0mbps We've disabled ipv6, tried static and dinamic IPs, tried both swcrypto=0 and swcrypto=1 options, none of whcih made any difference. The problem may be the symptom of high packet loss. For example, here's the output of iwconfig after booting and testing the speeds: wlan0 IEEE 802.11abg ESSID:"amu" Mode:Managed Frequency:2.462 GHz Access Point: 00:78:9E:FA:32:C8 Bit Rate=54 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=58/70 Signal level=-52 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:11 Invalid misc:3627 Missed beacon:0 I've posted a help request before with lots of technical info and outputs.

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  • How could I embed formatted XML source in WORD documents?

    - by eckes
    I'm writing a documentation with WORD that contains XML source code (whole files) as examples. The way I'm embedding the currently XML is quite cumbersome and doesn't seem to me as really maintainable: I'm finishing the editing of the document in WORD and create a PDF from it using Acrobat next, I open my XML files (2x input files, 2x generated output files) with IE and print them with the PDF printer supplied by Acrobat now, I open up Acrobat Pro and attach the four XML-PDF files to my original document The problem with that work flow for me is that it involves too much manual labor in order to get the documentation done. What I've tried up to now is not really satisfying for me: converting each XML to PDF and appending them like described above opening the XML files with SCiTE, copy as RTF and paste into Word playing around with the LaTeX packages minted, pygments and listings (I could write the docs with LaTeX too) but found some unsolvable problems in each of these packages I'm searching for a way that produces my documentation more automatic. For example embedding the XML files including formatting of IE (which I find quite readable). The files should be included by reference so that I don't have to paste the XML sources manually every time the XML changes.

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  • VBA Solution to VLOOKUP with Hyperlinks

    - by Emily2
    I am looking for some help with a VBA solution for preserving hyperlinks when using VLOOKUP on Excel (2010). I have a load of data on Sheet 1 for internal use only, and a cut-down version of this on Sheet 2. Instead of recreating Sheet 2 everytime, I am looking to have a working version which updates everytime Sheet1 is updated. Thus, I have used VLOOKUP on Sheet 2 so that only the desired info is returned on sheet 2. However, the problem was that sheet 1 contained in many cells Hyperlinks to external websites, and this would not pull through to Sheet2 using VLOOKUP. With some help, however, using the following VBA solution the hyperlinks now pull through: Function GetHyperLink(r As Range) As String If r.Hyperlinks.Count Then GetHyperLink = r.Hyperlinks(1).Address End If End Function And I am using the following formula in the relevant cell(s) in Sheet2: =HYPERLINK(GetHyperLink(INDEX('Sheet 1'!$B$1:$B$10001,MATCH(A4,'Sheet 1'!$A$1:$A$10001,0))),(VLOOKUP(A4,'Sheet 1'!$A$1:$B$10001,2,FALSE))) However, the problem is with formatting: every cell on Sheet2 is formatted blue and underlined, even although some of them do not contain a hyperlink! Is someone able to help with a VBA solution/formula to fix this last piece of the puzzle? Many thanks, in anticipation.

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