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• How do I pass a Python Variable to Bash?

  - by user336537

  Hello, How would I pass a Python variable to the Bash shell? It should work like this: foo="./RetVar.py 42" Replace the double-quotes with `s I have tried printing and sys.exiting the result, but to no avail. How would I accomplish my goal?

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• In pure C how can I pass a variable number of parameters into a function?

  - by fmsf

  Hey, How can i pass (and access) using C, not c++, variable parameters into a function? void foo(char* mandatory_param, char* optional_param, char* optional_param2...) thanks /fmsf

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• Is any way to get captcha value and store it in a variable?

  - by Vijay Prasath

  I am Using Selenium RC in C# My application has 3 Captha image in Different registration pages. i have a Huge script i will run it on night hours(when i am off). Hence i feel it will be better if i can capture the last displaying captcha image value and store it in to a variable so that i can input on the relevant field. Is it Possible ?

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• How do I customize the ASP.Net Bubble Event to pass an additional variable?

  - by CowKingDeluxe

  I am using BubbleEvent to give events from a web user control to its parent (which is a Default.aspx with code behind page). I would like to use BubbleEvent to not only pass the sender and event, but also an integer or another variable. Is there a way to add a parameter to the BubbleEvent, or is there a different way I should be approaching this?

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• What is the origin / meaning of these variable naming conventions?

  - by Andrew Hubbs

  What is the general meaning and where did it start to have variables with leading or trailing underscores? ex: _varName and varName_ I have always thought a leading underscore indicated the variable was a pointer but I don't know where I got this idea. Recently I have seen these naming conventions used in Java which makes that reasoning completely wrong.

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• Is there a universal way to get a nice String representation of a variable in VBA?

  - by HenryTyler

  In VBA, is there a nice way to get a String representation of a variable / object? Like Java's various String.valueOf(...) methods.

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• In C++, what happens when you return a variable?

  - by wowus

  What happens, step by step, when a variable is returned. I know that if it's a built-in and fits, it's thrown into rax/eax/ax. What happens when it doesn't fit, and/or isn't built-in? More importantly, is there a guaranteed copy constructor call? edit: What about the destructor? Is that called "sometimes", "always", or "never"?

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• How to store the hostname in a variable in a .bat file?

  - by eqbridges

  I would like to convert this /bin/sh syntax into a widely compatible Windows batch script: host=`hostname` echo ${host} How to do this so that it'll work on any Windows Vista, Windows XP, and Windows 2000 machine? To clarify: I would then like to go on in the program and use the hostname as stored in the variable host. In other words, the larger goal of the program is not to simply echo the hostname.

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• How can I save shell output to a variable in LaTeX?

  - by Frank

  I need to be able to execute a shell command through LaTeX [*] and have the resulting output available for use later on in the form of a LaTeX 'variable' (e.g., via a subsequent \newcommand command). If necessary a temporary file could be used to hold the output, although I would like to avoid this. I have been able to use \immediate\write18 to invoke a bash command before, but this was only used to write to a temporary file. [*] I realise that the -shell-escape flag must be set for this to be allowed

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• Why does 'url' not work as a variable here?

  - by kryptobs2000

  I originally had the variable cpanel named url and the code would not return anything. Any idea why? It doesn't seem to be used by anything else, but there's gotta be something I'm overlooking. import urllib2 cpanel = 'http://www.tas-tech.com/cpanel' req = urllib2.Request(cpanel) try: handle = urllib2.urlopen(req) except IOError, e: if hasattr(e, 'code'): if e.code != 401: print 'We got another error' print e.code else: print e.headers print e.headers['www-authenticate']

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• is it correct to unset the session variable for a particular index as the vay whole session is made

  - by OM The Eternity

  is it correct to unset the session variable for a particular index as the vay whole session is made unset in PHP? I know this works: unset($_SESSION['bannersize']) But does this works ? : unset($_SESSION['bannersize'][3]) or is there any other way to unset any particular desired index of the session and then again rearrange the values inside it to remove the empty index..?

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• how can i change the image url of an image based on #var=test variable?

  - by korben

  i'm try to change an image's imageurl on an aspx asp.net c# page based on a variable from #var=1 (or 2, or 3, or 4) i know nothing about javascript unfortunately which is what i've been told i need. can anyone point me at a novice based script i can try to learn via implementation?

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• Can I use a static variable from a Java class in res/values/styles.xml?

  - by neu242

  I want to refer to a static Java variable in my styles.xml, is that possible? Here's a pseudo-xml example: <style name="Artwork"> <item name="android:background">@drawable/border_{Constants.MY_COLOR}</item> </style>

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• Symfony: how to check if a variable saved in sfContext is set or not?

  - by user248959

  Hi, i have this code: if(sfContext::getInstance()->get('form_signin')){ //... } but im getting this error: The "form_signin" object does not exist in the current context. Any right way to check if a variable saved in sfContext is set or not ? Regards Javi

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• At what point should a Table Variable be abandoned for a Temp Table?

  - by Ryan

  Is there a row count that makes Table Variable's inefficient or what? I understand the differences between the two and I've seen some different figures on when that point is reached, but I'm curious if anyone knows.

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• What is the size of boolean variable in java?

  - by shangrila

  boolean variable have only two specified values ,"true" or "false" How does it stored in VM? Hmm...This is my first question here.Thank you all for answering me. :)

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• How is the scope of a variable/identifier maintained?

  - by eswar

  How is the scope of a variable/identifier maintained in the symbol table of a c/c++ compiler. Please suggest some good links and books to know the how compiling process of c/c++ program is implemented for better understanding.

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• How do I create a "global variable" in Java such that all classes can access it?

  - by Chrystle Soh

  here's my problem: I have multiple classes that are part of the same package and they need access to a certain file path String filePath = "D:/Users/Mine/School/Java/CZ2002_Assignment/src/" Rather than declaring the same Filepath in every single class, is it possible to simply have a "global" type of variable of this FilePath so that all classes can access it and I only need to declare and update it once. Thanks

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• Is there a method to convert PyUnicodeObject variable to PyObject type?

  - by karnol

  A value which is a PyUnicodeObject need to be passed to PyObject variable. Is there any conversion method for that? thanks karnol

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• Why can't i define recursive variable in code block?

  - by senia

  Why can't i define a variable recursively in a code block? scala> { | val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} | } <console>:9: error: forward reference extends over definition of value fibs val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} ^ scala> val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} fibs: Stream[Int] = Stream(1, ?) lazy keyword solves this problem, but i can't understand why it works without a code block but throws a compilation error in a code block.

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• Unittest in Django. Static variable feeded into the test case

  - by ziang

  I want to generate some dynamic data and feed these data in to test cases. But I found that Django will initial the test class every time to do the test. So the data will get generated every time django test framework calls the function. Is there anyway to use something like the singleton or static variable to solve the problem? What should be the solution? Thanks!

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• How can I affect PATH in a makefile variable? Why is my example not working?

  - by Geo

  At the beginning of a makefile I have this line : PATH := $(PATH):/other/dir and this gives this error: Recursive variable 'PATH' references itself. What do I have to do so it works?

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• How can I use the match variable $1 following a substitution in Perl?

  - by justintime

  What is the cleanest way of picking up a match variable form a substitution in Perl I sometimes find myself writing s/(something)// ; my $x = $1 ; then I realize that if the s/ / / fails $1 might be carrying over a value from a previous match. So I try my $x = 'defaultvalue' ; if ( s/(something)// ) { $x = $1 ; } Is this the cleanest way of doing it?

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• Possible to View Value of Script Variable in MySQL Query Browser's Script Window?

  - by Eric J.

  When stepping through a script in MySQL Query Browser's script window, is there any way to view the value of a variable I have just assigned? Specifically I do an update on one line, and then: SET @Num=row_count(); While debugging the script, I would like to be able to know the value of @Num

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• Why we need to set the variable private / public?

  - by Tattat

  Why don't make all variable private? All the variables must give a getter, setter to modify/read. Why leave the "public" keyword here? Except for convenient, any another reason for that?

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