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  • How do I read and write to a file using threads in java?

    - by WarmWaffles
    I'm writing an application where I need to read blocks in from a single file, each block is roughly 512 bytes. I am also needing to write blocks simultaneously. One of the ideas I had was BlockReader implements Runnable and BlockWriter implements Runnable and BlockManager manages both the reader and writer. The problem that I am seeing with most examples that I have found was locking problems and potential deadlock situations. Any ideas how to implement this?

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  • what should be the good approach to write javascript code?

    - by Bhupi
    Hi, which should be the good approach to write javascript code and why? 1) var myClass = function(){} myClass.prototype.init = function(x, y){ this.width = x; this.height = y; } myClass.prototype.show = function(){ alert("width = "+ this.width+" height = "+ this.height); } 2) var myNewClass = { init : function(x, y) { this.width = x; this.height = y; }, show : function() { alert("width = "+ this.width+" height = "+ this.height); } }

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  • Take user input and write to file from javascript inside a pdf?

    - by dazedandconfused
    Is it possible to have a pdf file that asks a user a set of questions and then writes their answers to a file, then next time it is viewed loads those answers as default values? I know pdfs can include javascript and have figured out how to add javascript to a pdf with iText (http://itextpdf.com/) but don't know how to prompt for user input or write to a file from inside the pdf. Any help would be appreciated.

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  • How do I write an MVC 1 app with MVC 2?

    - by SLC
    I went to http://www.asp.net/mvc and the web installer offered me the option to install MVC 2, but not MVC 1. I thought MVC 2 was still in beta? Either way, I need to write an MVC 1 app. In visual studio, my only choice is either ASP.NET Web Application or ASP.NET MVC 2 Web Application. Can anyone advise?

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  • Is there a way to read a c-string and then an int with a single scanf in C?

    - by Aux
    Hey, I'm trying to get this function to get the following output with the listed input, the "..." is where I'm not sure what to write: void Question8(void) { char sentence[100]; int grade; scanf(….); printf("%s %d", sentence, grade); } Input: My CS Grade is 1000 Output: My CS Grade is 100 However, the kicker is that I need the scanf to read a c-string and then an int with a single scanf command, is this even possible?

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  • Is it standard compliant to write font-size: 62.5%/1.2em in CSS?

    - by powerboy
    I noticed that some stylesheets have something like this: body { font-size: 62.5%/1.2em; } I got a warning "unexpected token /" when I wrote this in NetBeans. And if I changed the EM value, say, body { font-size: 62.5%/1em; } the computed font-size remained 16px. My question is, Is it standard compliant to write something like that? And how to computed the actual font-size?

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  • Yum Update Failing mod_ssl and glibc_devel

    - by Kerry
    Any ideas on how to get this to not fail? # yum update Freeing read locks for locker 0x82: 4189/140342084876032 Freeing read locks for locker 0x84: 4189/140342084876032 Freeing read locks for locker 0x85: 4189/140342084876032 Freeing read locks for locker 0x86: 4189/140342084876032 Freeing read locks for locker 0x87: 4189/140342084876032 Freeing read locks for locker 0x9a: 4189/140342084876032 Freeing read locks for locker 0x9c: 4189/140342084876032 Freeing read locks for locker 0x9d: 4189/140342084876032 Freeing read locks for locker 0x9e: 4189/140342084876032 Freeing read locks for locker 0x9f: 4189/140342084876032 Freeing read locks for locker 0xa0: 4189/140342084876032 Freeing read locks for locker 0xa1: 4189/140342084876032 Freeing read locks for locker 0xa2: 4189/140342084876032 Freeing read locks for locker 0xa3: 4189/140342084876032 Freeing read locks for locker 0xa4: 4189/140342084876032 Freeing read locks for locker 0xa5: 4189/140342084876032 Freeing read locks for locker 0xa6: 4189/140342084876032 Freeing read locks for locker 0xa7: 4189/140342084876032 Freeing read locks for locker 0xa8: 4189/140342084876032 Freeing read locks for locker 0xa9: 4189/140342084876032 Freeing read locks for locker 0xaa: 4189/140342084876032 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.hmc.edu * epel: mirrors.kernel.org * extras: centos.mirror.freedomvoice.com * updates: mirrors.sonic.net Setting up Update Process Resolving Dependencies There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them. The program yum-complete-transaction is found in the yum-utils package. --> Running transaction check ---> Package device-mapper-persistent-data.x86_64 0:0.2.8-2.el6 will be updated ---> Package device-mapper-persistent-data.x86_64 0:0.2.8-4.el6_5 will be an update ---> Package glibc-headers.x86_64 0:2.12-1.132.el6 will be updated --> Processing Dependency: glibc-headers = 2.12-1.132.el6 for package: glibc-devel-2.12-1.132.el6.x86_64 ---> Package glibc-headers.x86_64 0:2.12-1.132.el6_5.2 will be an update ---> Package httpd.x86_64 0:2.2.15-29.el6.centos will be updated --> Processing Dependency: httpd = 2.2.15-29.el6.centos for package: 1:mod_ssl-2.2.15-29.el6.centos.x86_64 ---> Package httpd.x86_64 0:2.2.15-30.el6.centos will be an update ---> Package kernel.x86_64 0:2.6.32-431.17.1.el6 will be installed ---> Package kernel-devel.x86_64 0:2.6.32-431.17.1.el6 will be installed ---> Package selinux-policy-targeted.noarch 0:3.7.19-231.el6_5.1 will be updated ---> Package selinux-policy-targeted.noarch 0:3.7.19-231.el6_5.3 will be an update --> Finished Dependency Resolution Error: Package: 1:mod_ssl-2.2.15-29.el6.centos.x86_64 (@base) Requires: httpd = 2.2.15-29.el6.centos Removing: httpd-2.2.15-29.el6.centos.x86_64 (@base) httpd = 2.2.15-29.el6.centos Updated By: httpd-2.2.15-30.el6.centos.x86_64 (updates) httpd = 2.2.15-30.el6.centos Error: Package: glibc-devel-2.12-1.132.el6.x86_64 (@base) Requires: glibc-headers = 2.12-1.132.el6 Removing: glibc-headers-2.12-1.132.el6.x86_64 (@base) glibc-headers = 2.12-1.132.el6 Updated By: glibc-headers-2.12-1.132.el6_5.2.x86_64 (updates) glibc-headers = 2.12-1.132.el6_5.2 Available: glibc-headers-2.12-1.132.el6_5.1.x86_64 (updates) glibc-headers = 2.12-1.132.el6_5.1 You could try using --skip-broken to work around the problem ** Found 34 pre-existing rpmdb problem(s), 'yum check' output follows: audit-2.2-4.el6_5.x86_64 is a duplicate with audit-2.2-2.el6.x86_64 audit-libs-2.2-4.el6_5.x86_64 is a duplicate with audit-libs-2.2-2.el6.x86_64 curl-7.19.7-37.el6_5.3.x86_64 is a duplicate with curl-7.19.7-37.el6_4.x86_64 device-mapper-multipath-0.4.9-72.el6_5.2.x86_64 is a duplicate with device-mapper-multipath-0.4.9-72.el6_5.1.x86_64 device-mapper-multipath-libs-0.4.9-72.el6_5.2.x86_64 is a duplicate with device-mapper-multipath-libs-0.4.9-72.el6_5.1.x86_64 2:ethtool-3.5-1.4.el6_5.x86_64 is a duplicate with 2:ethtool-3.5-1.2.el6_5.x86_64 glibc-2.12-1.132.el6_5.2.x86_64 is a duplicate with glibc-2.12-1.132.el6.x86_64 glibc-common-2.12-1.132.el6_5.2.x86_64 is a duplicate with glibc-common-2.12-1.132.el6.x86_64 glibc-devel-2.12-1.132.el6_5.2.x86_64 is a duplicate with glibc-devel-2.12-1.132.el6.x86_64 glibc-devel-2.12-1.132.el6_5.2.x86_64 has missing requires of glibc-headers = ('0', '2.12', '1.132.el6_5.2') gnutls-2.8.5-14.el6_5.x86_64 is a duplicate with gnutls-2.8.5-13.el6_5.x86_64 httpd-2.2.15-29.el6.centos.x86_64 has missing requires of httpd-tools = ('0', '2.2.15', '29.el6.centos') httpd-manual-2.2.15-30.el6.centos.noarch has missing requires of httpd = ('0', '2.2.15', '30.el6.centos') iproute-2.6.32-32.el6_5.x86_64 is a duplicate with iproute-2.6.32-31.el6.x86_64 kernel-firmware-2.6.32-431.17.1.el6.noarch is a duplicate with kernel-firmware-2.6.32-431.11.2.el6.noarch kernel-headers-2.6.32-431.17.1.el6.x86_64 is a duplicate with kernel-headers-2.6.32-431.11.2.el6.x86_64 kpartx-0.4.9-72.el6_5.2.x86_64 is a duplicate with kpartx-0.4.9-72.el6_5.1.x86_64 krb5-libs-1.10.3-15.el6_5.1.x86_64 is a duplicate with krb5-libs-1.10.3-10.el6_4.6.x86_64 libblkid-2.17.2-12.14.el6_5.x86_64 is a duplicate with libblkid-2.17.2-12.14.el6.x86_64 libcurl-7.19.7-37.el6_5.3.x86_64 is a duplicate with libcurl-7.19.7-37.el6_4.x86_64 libcurl-devel-7.19.7-37.el6_5.3.x86_64 is a duplicate with libcurl-devel-7.19.7-37.el6_4.x86_64 libtasn1-2.3-6.el6_5.x86_64 is a duplicate with libtasn1-2.3-3.el6_2.1.x86_64 libuuid-2.17.2-12.14.el6_5.x86_64 is a duplicate with libuuid-2.17.2-12.14.el6.x86_64 libxml2-2.7.6-14.el6_5.1.x86_64 is a duplicate with libxml2-2.7.6-14.el6.x86_64 mdadm-3.2.6-7.el6_5.2.x86_64 is a duplicate with mdadm-3.2.6-7.el6.x86_64 1:mod_ssl-2.2.15-30.el6.centos.x86_64 is a duplicate with 1:mod_ssl-2.2.15-29.el6.centos.x86_64 1:mod_ssl-2.2.15-30.el6.centos.x86_64 has missing requires of httpd = ('0', '2.2.15', '30.el6.centos') nss-softokn-3.14.3-10.el6_5.x86_64 is a duplicate with nss-softokn-3.14.3-9.el6.x86_64 openssl-1.0.1e-16.el6_5.7.x86_64 is a duplicate with openssl-1.0.1e-16.el6_5.4.x86_64 openssl-1.0.1e-16.el6_5.14.x86_64 is a duplicate with openssl-1.0.1e-16.el6_5.7.x86_64 openssl-devel-1.0.1e-16.el6_5.14.x86_64 is a duplicate with openssl-devel-1.0.1e-16.el6_5.7.x86_64 selinux-policy-3.7.19-231.el6_5.3.noarch is a duplicate with selinux-policy-3.7.19-231.el6_5.1.noarch tzdata-2014d-1.el6.noarch is a duplicate with tzdata-2014b-1.el6.noarch util-linux-ng-2.17.2-12.14.el6_5.x86_64 is a duplicate with util-linux-ng-2.17.2-12.14.el6.x86_64 UPDATE I installed and ran yum-complete-transaction as requested, it finished some things and suggested I run package-cleanup --problems, which yielded this: package-cleanup --problems Loaded plugins: fastestmirror Package httpd-manual-2.2.15-30.el6.centos.noarch requires httpd = ('0', '2.2.15', '30.el6.centos') Package httpd-2.2.15-29.el6.centos.x86_64 requires httpd-tools = ('0', '2.2.15', '29.el6.centos') Package mod_ssl-2.2.15-30.el6.centos.x86_64 requires httpd = ('0', '2.2.15', '30.el6.centos') Package glibc-devel-2.12-1.132.el6_5.2.x86_64 requires glibc-headers = ('0', '2.12', '1.132.el6_5.2') I'm definitely not a sys-admin, what would be the next step? UPDATE 2 I ran yum distro-sync: # yum distro-sync Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.hmc.edu * epel: mirrors.kernel.org * extras: centos.mirror.freedomvoice.com * updates: mirrors.sonic.net Setting up Distribution Synchronization Process Resolving Dependencies --> Running transaction check ---> Package glibc-headers.x86_64 0:2.12-1.132.el6 will be updated --> Processing Dependency: glibc-headers = 2.12-1.132.el6 for package: glibc-devel-2.12-1.132.el6.x86_64 ---> Package glibc-headers.x86_64 0:2.12-1.132.el6_5.2 will be an update ---> Package httpd.x86_64 0:2.2.15-29.el6.centos will be updated --> Processing Dependency: httpd = 2.2.15-29.el6.centos for package: 1:mod_ssl-2.2.15-29.el6.centos.x86_64 ---> Package httpd.x86_64 0:2.2.15-30.el6.centos will be an update --> Finished Dependency Resolution Error: Package: 1:mod_ssl-2.2.15-29.el6.centos.x86_64 (@base) Requires: httpd = 2.2.15-29.el6.centos Removing: httpd-2.2.15-29.el6.centos.x86_64 (@base) httpd = 2.2.15-29.el6.centos Updated By: httpd-2.2.15-30.el6.centos.x86_64 (updates) httpd = 2.2.15-30.el6.centos Error: Package: glibc-devel-2.12-1.132.el6.x86_64 (@base) Requires: glibc-headers = 2.12-1.132.el6 Removing: glibc-headers-2.12-1.132.el6.x86_64 (@base) glibc-headers = 2.12-1.132.el6 Updated By: glibc-headers-2.12-1.132.el6_5.2.x86_64 (updates) glibc-headers = 2.12-1.132.el6_5.2 Available: glibc-headers-2.12-1.132.el6_5.1.x86_64 (updates) glibc-headers = 2.12-1.132.el6_5.1 You could try using --skip-broken to work around the problem ** Found 34 pre-existing rpmdb problem(s), 'yum check' output follows: audit-2.2-4.el6_5.x86_64 is a duplicate with audit-2.2-2.el6.x86_64 audit-libs-2.2-4.el6_5.x86_64 is a duplicate with audit-libs-2.2-2.el6.x86_64 curl-7.19.7-37.el6_5.3.x86_64 is a duplicate with curl-7.19.7-37.el6_4.x86_64 device-mapper-multipath-0.4.9-72.el6_5.2.x86_64 is a duplicate with device-mapper-multipath-0.4.9-72.el6_5.1.x86_64 device-mapper-multipath-libs-0.4.9-72.el6_5.2.x86_64 is a duplicate with device-mapper-multipath-libs-0.4.9-72.el6_5.1.x86_64 2:ethtool-3.5-1.4.el6_5.x86_64 is a duplicate with 2:ethtool-3.5-1.2.el6_5.x86_64 glibc-2.12-1.132.el6_5.2.x86_64 is a duplicate with glibc-2.12-1.132.el6.x86_64 glibc-common-2.12-1.132.el6_5.2.x86_64 is a duplicate with glibc-common-2.12-1.132.el6.x86_64 glibc-devel-2.12-1.132.el6_5.2.x86_64 is a duplicate with glibc-devel-2.12-1.132.el6.x86_64 glibc-devel-2.12-1.132.el6_5.2.x86_64 has missing requires of glibc-headers = ('0', '2.12', '1.132.el6_5.2') gnutls-2.8.5-14.el6_5.x86_64 is a duplicate with gnutls-2.8.5-13.el6_5.x86_64 httpd-2.2.15-29.el6.centos.x86_64 has missing requires of httpd-tools = ('0', '2.2.15', '29.el6.centos') httpd-manual-2.2.15-30.el6.centos.noarch has missing requires of httpd = ('0', '2.2.15', '30.el6.centos') iproute-2.6.32-32.el6_5.x86_64 is a duplicate with iproute-2.6.32-31.el6.x86_64 kernel-firmware-2.6.32-431.17.1.el6.noarch is a duplicate with kernel-firmware-2.6.32-431.11.2.el6.noarch kernel-headers-2.6.32-431.17.1.el6.x86_64 is a duplicate with kernel-headers-2.6.32-431.11.2.el6.x86_64 kpartx-0.4.9-72.el6_5.2.x86_64 is a duplicate with kpartx-0.4.9-72.el6_5.1.x86_64 krb5-libs-1.10.3-15.el6_5.1.x86_64 is a duplicate with krb5-libs-1.10.3-10.el6_4.6.x86_64 libblkid-2.17.2-12.14.el6_5.x86_64 is a duplicate with libblkid-2.17.2-12.14.el6.x86_64 libcurl-7.19.7-37.el6_5.3.x86_64 is a duplicate with libcurl-7.19.7-37.el6_4.x86_64 libcurl-devel-7.19.7-37.el6_5.3.x86_64 is a duplicate with libcurl-devel-7.19.7-37.el6_4.x86_64 libtasn1-2.3-6.el6_5.x86_64 is a duplicate with libtasn1-2.3-3.el6_2.1.x86_64 libuuid-2.17.2-12.14.el6_5.x86_64 is a duplicate with libuuid-2.17.2-12.14.el6.x86_64 libxml2-2.7.6-14.el6_5.1.x86_64 is a duplicate with libxml2-2.7.6-14.el6.x86_64 mdadm-3.2.6-7.el6_5.2.x86_64 is a duplicate with mdadm-3.2.6-7.el6.x86_64 1:mod_ssl-2.2.15-30.el6.centos.x86_64 is a duplicate with 1:mod_ssl-2.2.15-29.el6.centos.x86_64 1:mod_ssl-2.2.15-30.el6.centos.x86_64 has missing requires of httpd = ('0', '2.2.15', '30.el6.centos') nss-softokn-3.14.3-10.el6_5.x86_64 is a duplicate with nss-softokn-3.14.3-9.el6.x86_64 openssl-1.0.1e-16.el6_5.7.x86_64 is a duplicate with openssl-1.0.1e-16.el6_5.4.x86_64 openssl-1.0.1e-16.el6_5.14.x86_64 is a duplicate with openssl-1.0.1e-16.el6_5.7.x86_64 openssl-devel-1.0.1e-16.el6_5.14.x86_64 is a duplicate with openssl-devel-1.0.1e-16.el6_5.7.x86_64 selinux-policy-3.7.19-231.el6_5.3.noarch is a duplicate with selinux-policy-3.7.19-231.el6_5.1.noarch tzdata-2014d-1.el6.noarch is a duplicate with tzdata-2014b-1.el6.noarch util-linux-ng-2.17.2-12.14.el6_5.x86_64 is a duplicate with util-linux-ng-2.17.2-12.14.el6.x86_64

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  • How do I make the 32-bit Perl read the 64-bit Windows registry?

    - by Santhosh
    I have a 32-bit perl installer. Using this I need to be able to install and uninstall both 32- and 64-bit applications. Installing 32- and 64-bit is fine. Uninstalling 32-bit is also ok. However, I have a problem while uninstalling 64-bit applications. The application just knows the name of the application as seen in Add Remove programs in control panel. For instance it could be "Winzip 14.0" which is the display name for Winzip. I use the following approach for uninstallation : I traverse to HKLM/Software/Microsoft/Windows/CurrentVersion/Uninstall and parse the keys present there to see if Winzip is matching. If so i get the uninstall string from there. my $register = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall"; $HKEY_LOCAL_MACHINE->Open($register,$hKey)|| die $!; #Then parse all the nodes and fetch the uninstall string If the application is a 64-bit installation, then the uninstallation information will reside in HKLM/Software/Microsoft/Windows/CurrentVersion/Uninstall. However the above given perl installer code is trying to read from HKLM/Software/WOW6432Node/Microsoft/Windows/CurrentVersion/Uninstall and it does not find the installation there. So how do I make the Perl code running in a 32_bit process to read the registry value found in 64-bit hive? I am aware of the RegOpenKey() API that takes KEY_WOW64_64KEY parameter. But since it is a Windows API, I dont know if that will help. Even then, is there any other alternative?

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  • How to Increase the time till a read timeout error occurs?

    - by Alex
    Hi all. I've written in PHP a script that takes a long time to execute [Image processing for thousands of pictures]. It's a meter of hours - maybe 5. After 15 minutes of processing, I get the error: ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: The URL which I clicked Read Timeout The system returned: [No Error] A Timeout occurred while waiting to read data from the network. The network or server may be down or congested. Please retry your request. Your cache administrator is webmaster. What I need is to enable that script to run for much longer. Now, here are all the technical info: I'm writing in PHP and using the Zend Framework. I'm using Firefox. The long script that is processed is done after clicking a link. Obviously, since the script is not over I see the web page on which the link was and the web browser writes "waiting for ...". After 15 minutes the error occurs. I tried to make changes to Firefox threw about:config but without any success. I don't know, but the changes might be needed somewhere else. So, any ideas? Thanks ahead.

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  • Moose read-only Attribute Traits and how to set them?

    - by Evan Carroll
    How do I set a Moose read only attribute trait? package AttrTrait; use Moose::Role; has 'ext' => ( isa => 'Str', is => 'ro' ); package Class; has 'foo' => ( isa => 'Str', is => 'ro', traits => [qw/AttrTrait/] ); package main; my $c = Class->new( foo => 'ok' ); $c->meta->get_attribute('foo')->ext('die') # ro attr trait What is the purpose of Read Only attribute traits if you can't set it in the constructor or in runtime? Is there something I'm missing in Moose::Meta::Attribute? Is there a way to set it using meta? $c->meta->get_attr('ext')->set_value('foo') # doesn't work either (attribute trait provided not class provided method)

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  • How do I read the manifest file for a webapp running in apache tomcat?

    - by Nik Reiman
    I have a webapp which contains a manifest file, in which I write the current version of my application during an ant build task. The manifest file is created correctly, but when I try to read it in during runtime, I get some strange side-effects. My code for reading in the manifest is something like this: InputStream manifestStream = Thread.currentThread() .getContextClassLoader() .getResourceAsStream("META-INFFFF/MANIFEST.MF"); try { Manifest manifest = new Manifest(manifestStream); Attributes attributes = manifest.getMainAttributes(); String impVersion = attributes.getValue("Implementation-Version"); mVersionString = impVersion; } catch(IOException ex) { logger.warn("Error while reading version: " + ex.getMessage()); } When I attach eclipse to tomcat, I see that the above code works, but it seems to get a different manifest file than the one I expected, which I can tell because the ant version and build timestamp are both different. Then, I put "META-INFFFF" in there, and the above code still works! This means that I'm reading some other manifest, not mine. I also tried this.getClass().getClassLoader().getResourceAsStream(...) But the result was the same. What's the proper way to read the manifest file from inside of a webapp running in tomcat? Edit: Thanks for the suggestions so far. Also, I should note that I am running tomcat standalone; I launch it from the command line, and then attach to the running instance in Eclipse's debugger. That shouldn't make a difference, should it?

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  • Read line and change the line that not consist of certain words and not end with dot

    - by igo
    I wanna read some text files in a folder line by line. for example of 1 txt : Fast and Effective Text Mining Using Linear-time Document Clustering Bjornar Larsen WORD2 Chinatsu Aone SRA International AK, Inc. 4300 Fair Lakes Cow-l Fairfax, VA 22033 {bjornar-larsen, WORD1 I wanna remove line that does not contain of words = word, word2, word3, and does not end with dot . so. from the example, the result will be : Bjornar Larsen WORD2 Chinatsu Aone SRA International, Inc. {bjornar-larsen, WORD1 I am confused, hw to remove the line? it that possible? or can we replace them with a space? here's the code : $url = glob($savePath.'*.txt'); foreach ($url as $file => $files) { $handle = fopen($files, "r") or die ('can not open file'); $ori_content= file_get_contents($files); foreach(preg_split("/((\r?\n)|(\r\n?))/", $ori_content) as $buffer){ $pos1 = stripos($buffer, $word1); $pos2 = stripos($buffer, $word2); $pos3 = stripos($buffer, $word3); $last = $str[strlen($buffer)-1];//read the las character if (true !== $pos1 OR true !== $pos2 OR true !==$pos3 && $last != '.'){ //how to remove } } } please help me, thank you so much :)

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  • Is it possible to read data that has been separately copied to the Android sd card without having ro

    - by icecream
    I am developing an application that needs to access data on the sd card. When I run on my development device (an odroid with Android 2.1) I have root access and can construct the path using: File sdcard = Environment.getExternalStorageDirectory(); String path = sdcard.getAbsolutePath() + File.separator + "mydata" File data = new File(path); File[] files = data.listFiles(new FilenameFilter() { @Override public boolean accept(File dir, String filename) { return filename.toLowerCase().endsWith(".xyz"); }}); However, when I install this on a phone (2.1) where I do not have root access I get files == null. I assume this is because I do not have the right permissions to read the data from the sd card. I also get files == null when just trying to list files on /sdcard. So the same applies without my constructed path. Also, this app is not intended to be distributed through the app store and is needs to use data copied separately to the sd card so this is a real use-case. It is too much data to put in res/raw (I have tried, it did not work). I have also tried adding: <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> to the manifest, even though I only want to read the sd card, but it did not help. I have not found a permission type for reading the storage. There is probably a correct way to do this, but I haven't been able to find it. Any hints would be useful.

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  • Is using YIELD a read-only way to return a collection?

    - by Eric
    I'm writing an interface which has a collection property which I want to be read only. I don't want users of the interface to be able to modify the collection. The typical suggestion I've found for creating a read only collection property is to set the type of the property to IEnumerable like this: private List<string> _mylist; public IEnumerable<string> MyList { get { return this._mylist; } } Yet this does not prevent the user from casting the IEnumerable back to a List and modifying it. If I use a Yield keyword instead of returning _mylist directly would this prevent users of my interface from being able to modify the collection. I think so because then I'm only returning the objects one by one, and not the actual collection. private List<string> _mylist; public IEnumerable<string> MyList { get { foreach(string str in this._mylist) { yield return str; } } }

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  • How do you read a file line by line in your language of choice?

    - by Jon Ericson
    I got inspired to try out Haskell again based on a recent answer. My big block is that reading a file line by line (a task made simple in languages such as Perl) seems complicated in a functional language. How do you read a file line by line in your favorite language? So that we are comparing apples to other types of apples, please write a program that numbers the lines of the input file. So if your input is: Line the first. Next line. End of communication. The output would look like: 1 Line the first. 2 Next line. 3 End of communication. I will post my Haskell program as an example. Ken commented that this question does not specify how errors should be handled. I'm not overly concerned about it because: Most answers did the obvious thing and read from stdin and wrote to stdout. The nice thing is that it puts the onus on the user to redirect those streams the way they want. So if stdin is redirected from a non-existent file, the shell will take care of reporting the error, for instance. The question is more aimed at how a language does IO than how it handles exceptions. But if necessary error handling is missing in an answer, feel free to either edit the code to fix it or make a note in the comments.

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  • How to automatically read in calculated values with PHPExcel?

    - by Edward Tanguay
    I have the following Excel file: I read it in by looping over every cell and getting the value with getCell(...)->getValue(): $highestColumnAsLetters = $this->objPHPExcel->setActiveSheetIndex(0)->getHighestColumn(); //e.g. 'AK' $highestRowNumber = $this->objPHPExcel->setActiveSheetIndex(0)->getHighestRow(); $highestColumnAsLetters++; for ($row = 1; $row < $highestRowNumber + 1; $row++) { $dataset = array(); for ($columnAsLetters = 'A'; $columnAsLetters != $highestColumnAsLetters; $columnAsLetters++) { $dataset[] = $this->objPHPExcel->setActiveSheetIndex(0)->getCell($columnAsLetters.$row)->getValue(); if ($row == 1) { $this->column_names[] = $columnAsLetters; } } $this->datasets[] = $dataset; } However, although it reads in the data fine, it reads in the calculations literally: I understand from discussions like this one that I can use getCalculatedValue() for calculated cells. The problem is that in the Excel sheets I am importing, I do not know beforehand which cells are calculated and which are not. Is there a way for me to read in the value of a cell in a way that automatically gets the value if it has a simple value and gets the result of the calculation if it is a calculation? Answer: It turns out that getCalculatedValue() works for all cells, makes me wonder why this isn't the default for getValue() since I would think one would usually want the value of the calculations instead of the equations themselves, in any case this works: ...->getCell($columnAsLetters.$row)->getCalculatedValue();

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  • What is the easiest way to read wav-files using Python [summary]?

    - by Roman
    I want to use Python to access a wav-file and write its content in a form which allows me to analyze it (let's say arrays). I heard that "audiolab" is a suitable tool for that (it transforms numpy arrays into wav and vica versa). I have installed the "audiolab" but I had a problem with the version of numpy (I could not "from numpy.testing import Tester"). I had 1.1.1. version of numpy. I have installed a newer version on numpy (1.4.0). But then I got a new set of errors: Traceback (most recent call last): File "test.py", line 7, in import scikits.audiolab File "/usr/lib/python2.5/site-packages/scikits/audiolab/init.py", line 25, in from pysndfile import formatinfo, sndfile File "/usr/lib/python2.5/site-packages/scikits/audiolab/pysndfile/init.py", line 1, in from _sndfile import Sndfile, Format, available_file_formats, available_encodings File "numpy.pxd", line 30, in scikits.audiolab.pysndfile._sndfile (scikits/audiolab/pysndfile/_sndfile.c:9632) ValueError: numpy.dtype does not appear to be the correct type object I gave up to use audiolab and thought that I can use "wave" package to read in a wav-file. I asked a question about that but people recommended to use scipy instead. OK, I decided to focus on scipy (I have 0.6.0. version). But when I tried to do the following: from scipy.io import wavfile x = wavfile.read('/usr/share/sounds/purple/receive.wav') I get the following: Traceback (most recent call last): File "test3.py", line 4, in <module> from scipy.io import wavfile File "/usr/lib/python2.5/site-packages/scipy/io/__init__.py", line 23, in <module> from numpy.testing import NumpyTest ImportError: cannot import name NumpyTest So, I gave up to use scipy. Can I use just wave package? I do not need much. I just need to have content of wav-file in human readable format and than I will figure out what to do with that.

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  • I want to read program content from command line.

    - by Alexandre Dominos
    I am trying to update a program which was wrotten in 1995 with pascal or c. I am not sure about programming language. Command line program. Now I am coded in C#. And I want to read program command line content. Is it possible? I tried something. But not succesfull. They are: private void aboutToolStripMenuItem_Click(object sender, EventArgs e) { // Redirect the output stream of the child process. p.StartInfo.UseShellExecute = false; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.FileName = "osl.exe"; p.Start(); logs.AppendText("Timer Started\n"); timer1.Enabled = true; } private void timer1_Tick(object sender, EventArgs e) { // write somethingg and read what is the program doing on command line? // What is the program printint? etc... // I try this code but not enough for mo. // logs.AppendText("d:" + p.StandardOutput.ReadToEnd()+"\n"); } private void p_Exited(object sender, EventArgs e) { timer1.Enabled = false; } i am open to any idea in java,cpp,c,c#.

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