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Search found 16311 results on 653 pages for 'environment variables'.

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  • Linux: programatically setting a permanent environment variable

    - by Richard
    Hello All, I am writing a little install script for some software. All it does is unpack a target tar, and then i want to permanently set some environment variables - principally the location of the unpacked libs and updating $PATH. Do I need to programmatically edit the .bashrc file, adding the appropriate entries to the end for example, or is there another way? What's standard practice? Thanks

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  • Pass variables between separate instances of ruby (without writing to a text file or database)

    - by boulder_ruby
    Lets say I'm running a long worker-script in one of several open interactive rails consoles. The script is updating columns in a very, very, very large table of records. I've muted the ActiveRecord logger to speed up the process, and instruct the script to output some record of progress so I know how roughly how long the process is going to take. That is what I am currently doing and it would look something like this: ModelName.all.each_with_index do |r, i| puts i if i % 250 ...runs some process... r.save end Sometimes its two nested arrays running, such that there would be multiple iterators and other things running all at once. Is there a way that I could do something like this and access that variable from a separate rails console? (such that the variable would be overwritten every time the process is run without much slowdown) records = ModelName.all $total = records.count records.each_with_index do |r, i| $i = i ...runs some process... r.save end meanwhile mid-process in other console puts "#{($i/$total * 100).round(2)}% complete" #=> 67.43% complete I know passing global variables from one separate instance of ruby to the next doesn't work. I also just tried this to no effect as well unix console 1 $X=5 echo {$X} #=> 5 unix console 2 echo {$X} #=> "" Lastly, I also know using global variables like this is a major software design pattern no-no. I think that's reasonable, but I'd still like to know how to break that rule if I'd like. Writing to a text file obviously would work. So would writing to a separate database table or something. That's not a bad idea. But the really cool trick would be sharing a variable between two instances without writing to a text file or database column. What would this be called anyway? Tunneling? I don't quite know how to tag this question. Maybe bad-idea is one of them. But honestly design-patterns isn't what this question is about.

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  • Development environment to use/learn VTK with C++

    - by jv2010
    Hi, I am a newbie with VTK and C++ (but am well versed in the concepts/Java etc). I will eventually need to use both QT and VTK for my project. (1) I would like to know if there is a "development environment"/"editor" for VTK (using C++) ? (2) Something similar to VTK Designer (http://www.vcreatelogic.com/products/vtkd/) ? With VTK Designer, I am very disappointed that there is no feature to convert the VTK output into C++ code. Thanks in advance

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  • How do I pass session variables from one domain to another in PHP

    - by Dave
    Hi everyone, I have encountered a situation where I need to pass $_SESSION variables from one domain to an iFrame page from another domain. I have spent the last 16 days trying various methods to no avail. I think that the only logical way would be to encode the variables in the url that calls the iFrame and decode them in th iFrame page. I am not sure how to go about this and I am looking for any samples, assistance etc that I can find. Thanks for any and all suggestions. Here is an example of what I am trying to do... Example: <!-- Note only using hidden as I didn't want to build the form at test phase--> <form name="test" method="post" action="iframe_test.php"> <input type="submit" name="Submit" /> <input type="hidden" name="fName" value="abc" /> <input type="hidden" name="lName" value="def" /> <input type="hidden" name="address1" value="ghi" /> <input type="hidden" name="address2" value="jkl" /> <input type="hidden" name="country" value="mno" /> <input type="hidden" name="postal_code" value="pqr" /> <input type="hidden" name="city" value="stu" /> <input type="hidden" name="retUrl" value="vwx"> <input type="hidden" name="decUrl" value="yz"> So from here I am hitting the iframe_test.php and doing the following: PHP Code: function StripSpecChar($val) { return (preg_replace('/[^a-zA-Z0-9" "-.@\:\/_]/','', $val)); } foreach ($_POST as $key => $val) { $_SESSION[$key] = StripSpecChar($val); } and I get a session array that looks like this: Code: Array ( [fName] => abc [lName] => def [address1] => ghi [address2] => jkl [country] => mno [postal_code] => pqr [city] => stu [retUrl] => vwx [decUrl] => yz ) Still all good so far....call the iFrame Code: <body> Some page stuff here <div align="center"><span class="style1"><strong>This is the iFrame Page</strong></span> </div> <div align="center"> <iframe src="https://www.other_domain.org/iframe/reserve.php" width="500" height="350" frameBorder="0"></iframe> </div> </body> So HOW do I take... $_SESSION['fName']['abc']; $_SESSION['lName']['def']; $_SESSION['address1']['ghi']; $_SESSION['address2']['jkl']; $_SESSION['country']['mno']; $_SESSION['postal_code']['pqr']; $_SESSION['city']['stu']; $_SESSION['retUrl']['vwx']; $_SESSION['decUrl']['yz']; and turn it into the encoded url that I am looking for? Further once that is done how to I get the session vars back as session vars on that new domain iFrame page...

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  • Including phonon environment setup in Qt Creator

    - by Roger B
    On Windows XP, I ran "configure", and Qt says that I'm configured to use phonon, but I'm not sure how to set up my environment correctly in Qt Creator. According to the Qt documentation, I need to call: Set DXSDK_DIR=C:\Program Files\Microsoft DirectX SDK (February 2007) %DXSDK_DIR%\utilities\bin\dx_setenv.cmd C:\program files\Microsoft Platform SDK\setenv.cmd How do I do this in the Qt Creator IDE? Thanks!

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  • How can I set environment variables depending on directory

    - by kjs3
    If I have 'export BLA="hey there"' in .profile in my home directory, how can I change this later in other directories just by cd into the other directory? Also, is there a way to just set a new environment variable when I cd into a directory. My first attempt was to just make another .bashrc file in the directory where I want the change but apparently that proved less than effective. I'm on OS X btw.

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  • TERM environment variable not set

    - by rahkarp
    I'm using python to develop an app and want to view running processes.The code txt = commands.getoutput("top -d 1") print txt gives an error "TERM Environment Variable not set" Can someone tell me what this means and how to solve this

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  • Exporting an Environment Variable in Ruby

    - by wilhelmtell
    How do I export an environment variable from within a Ruby script to the parent shell? For example, implementing a naïve implementation of the /usr/bin/read utility: #!/usr/bin/ruby varname = ARGV[0] ENV[varname] = STDIN.gets # but have varname exported to the parent process

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  • Is How the Company Makes Its Money One of The Most Important Determining Factors in their work environment, culture, etc

    - by programmx10
    This is a viewpoint I've started to realize recently about some companies that I have worked for. They had their own software product that they developed in-house but most of the focus was on building an in-person sales team to push their product to businesses throughout the country. I figure that companies that are exclusively "online", meaning that their revenue source comes from online transactions where there is no "face" of the company to the customer would have a different work culture. Just curious if anyone has worked for both types of companies and notices a difference. I myself am hoping to get more into contract programming and figure that companies that don't have to employ a sales-force and things like that would be more focused on technology and maybe even willing to be flexible on partial telecommute, etc

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  • Question on PL/SQL - Evaluate the PL/SQL block given above and determine the data type and value of each of the following variables [closed]

    - by Annie
    DECLARE v_custid NUMBER(4) := 1600; v_custname VARCHAR2(300) := 'Women Sports Club'; v_ new_custid NUMBER(3) := 500; BEGIN DECLARE v_custid NUMBER(4) := 0; v_custname VARCHAR2(300) := 'Shape up Sports Club'; v_new_custid NUMBER(3) := 300; v_new_custname VARCHAR2(300) := 'Jansports Club'; BEGIN v_custid := v_new_custid; v_custname := v_custname || ' ' || v_new_custname; END; v_custid := (v_custid *12) / 10; END; /

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  • UIView drawRect; class variables out of scope

    - by Toby Wilson
    Short & sweet version of my last question in light of new information. I have a UIVIew with an init and a drawrect method (and another thread and a bunch of other stuff, but I'll keep it short & sweet). All of the class variables that I alloc and init in the -(id)init method are out of scope/nil/0x0 in the drawRect method, and I am unable to access them. For example; In the interface: NSObject* fred; In the implementation: -(id)init { if(self == [super init]) { fred = [[NSObject alloc] init]; } return self; } -(void)drawRect:(CGRect)rect { NSLog(@"Fred is retained %i times",[fred retainCount]); //FAIL NSLog(@"But his variable is actually just pointing at uninitialised 0x0, so you're not reading this in the debugger because the application has crashed before it got here." } Should add that init IS being called before drawRect also. Anyone have any ideas?

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  • How do you give variables reference in javascript?

    - by Eric
    I want to give variables reference in javascript. For example, I want to do: a=1 b=a a=2 and have b=2, and change accordingly to a. Is this possible in javascript? If it isn't is there a way to do like a.onchange = function () {b=a}? What I wanted to do was make a function like makeobject which make an object and puts it in an array and than returns it like function makeobject() { objects[objects.length] = {blah:'whatever',foo:8}; } so than I could do a=makeobject() b=makeobject() c=makeobject() and later in the code do for (i in objects) { objects[i].blah = 'whatev'; } and also change the values of a,b and c

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  • Js constants with variables inside.

    - by johnnyArt
    I know I'm able to this in PHP, but I can't remember the name or the way to do it, so I'll just explain what it is, and when someone tells me how it's called I'll update this question. I have some error messages defined as constants on javascript, however, some of those messages need to contain dynamic part as in the following example. "The username must be between 4 and 20 characters" In php, If I'm not mistaken there was some option for storing that string in a way that when called it would replace the variables with the data provided on the call. I want to do that on javascript, something like: config['string',vars] And have javascript insert those vars inside the string so it's customized. Wow, this must be the worst question I've made! I'm sorry for the lack of information, I'm kinda braindead on Sundays.

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  • Create New Pseudo Variables in Squeak

    - by Artium
    Large part of squeak is implemented using squeak itself. I am curious to know if pseudo variables such as self or true are also implemented using squeak. If the answer is yes, where the implementation located? Specifically, assume that I want to add new subclass of "Boolean" called "Other" which will represent a third option: neither true nor false. I want that other, the only instance of Other to be similar to the true/false global singletons. Any ideas? Thank you.

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  • Lexical and dynamic scoping in Mathematica: Local variables with Module, With, and Block

    - by dreeves
    The following code returns 14 as you'd expect: Block[{expr}, expr = 2 z; f[z_] = expr; f[7]] But if you change that Block to a Module then it returns 2*z. It seems to not matter what other variables besides expr you localize. I thought I understood Module, Block, and With in Mathematica but I can't explain the difference in behavior between Module and Block in this example. Related resources: Tutorial on Modularity and the Naming of Things from the Mathematica documentation Excerpt from a book by Paul R. Wellin, Richard J. Gaylord, and Samuel N. Kamin Explanation from Dave Withoff on the Mathematica newsgroup

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  • Static Class Variables in Dynamic Library and Main Program

    - by Paul
    I am working on a project that has a class 'A' that contains a static stl container class. This class is included in both my main program and a .so file. The class uses the default(implicit, not declared) constructor/destructor. The main program loads the .so file using dlopen() and in its destructor, calls dlclose(). The program crashes after main exits when glibc calls the destructor for the static class member variable. The problem appears to be that when dlclose() is called, the destructor for the static variable is called, then when main exits() glibc also calls the destructor, resulting in a double free. I have 2 questions, namely: 1) In this particular case, why are there not two copies of the static variable(yes i know that sounds somewhat ridiculous, but since both the main program and .so file have a separately compiled 'A', shouldn't they each have one?) 2) Is there any way to resolve this issue without re-writing class 'A' to not contain static member variables?

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  • Error loading Variables stage.loaderInfo - AS3

    - by Dimitree
    I have a Document class that loads variables from Facebook with the use of stage.loaderInfo var connect:FacebookConnectObject = new FacebookConnectObject( facebook, API_KEY, this.stage.loaderInfo ); But when I change the Document class (with another one responsible for the layout of my app), and try call the above from a movieclip that exists in my application with the use: var facebook_class:FacebookAp = new FaceBppkApp addChild(facebook_class) I get error TypeError: Error #1009: Cannot access a property or method of a null object reference. I believe the error comes fro this line this.stage.loaderInfo since I changed the scope... How I am supposed to fix that?

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  • Global variables in jQuery

    - by Thorpe Obazee
    I have been working on this script: <script type="text/javascript" src="/js/jquery.js"></script> <script type="text/javascript"> $(function(){ compentecy = $('#competency_id'); $('#add_competency').bind('click', function(e){ e.preventDefault(); $.post('/script.php', {competency_id: compentecy.val(), syllabus_id: 2}, function(){ // competency = $('#competency_id'); competency.children('option[value=' + compentecy.val() + ']').remove(); }); }); }); </script> in the $.post callback function, it seems that I can't access global variables. I tried $.competency but it didn't work. I always get a "competency is undefined" error. I had to reinitialize the variable once again inside the callback. Is there a way to NOT reinitialize the variable inside the callback?

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  • Running Script before/after Variables declared?

    - by Sam
    Hi folks. As i understand javascript .js files are best to put all the way at the bottom of html pages, to speed up loading of rest of page. Advised by Yslow(Yahoo) and Page Speed(google). Now, when in the middle of page some thing RUNS a javascript script, in Internet Explorer, i see a small warning message saying that the element is: Uncaught ReferenceError: SWFObject is not defined When i put my all.js file in the had, the error goes away but page load slows doen. What to do? Actually, i remember it was the same with php variables. If i RUN php but the variable comes later, then it just doesnt work. must define the variable first, for it to run. How to make this workflow better, in case of php scripts? and in case of javsscripts? Thanks!

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  • - Default value of variables at the time of declaration -

    - by gotye
    Hey guys, I was wondering what was the default values of variables before I intialize them .. For example, if I do : //myClass.h BOOL myBOOL; // default value ? NSArray *myArray; // default value ? NSUInteger myInteger; // default value ? Some more examples here : //myClass.m // myArray is not initialized, only declared in .h file if ([myArray count] == 0) { // TRUE or FALSE ? // do whatever } More generally, what is returned when I do : [myObjectOnlyDeclaredAndNotInitialized myCustomFunction]; Thank you for your answers. Gotye.

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