One of the arguments I've heard against functional languages is that single assignment coding is too hard, or at least significantly harder than "normal" programming. But looking through my code, I realized that I really don't have many (any?) use patterns that can't be written just as well using single assignment form if you're writing...
Say way have a variable (let's say String Str) and the value of Str starts of as " " then as some code is running it is set to "test" then somewhere else in the code it is changed again to say "tester". Now in the program I want to find out what the previous value of Str was. Is this possible in Java? So I am saying that the variable ge...
I've got a script 'myscript' that contains the following: abc def ghi in another script, I call: declare RESULT=$(./myscript) and $RESULT gets the value abc def ghi Is there a way to store the result either with the newlines, or with '\n' character so I can output it with 'echo -e'? ...
I have seen this mentioned a lot but I have never figured out what it meant. Can anyone help me out? ...
I am getting into Groovy language, which has dynamic typing (as well as optional static typing). It also has native support for Lists, Maps, and Ranges, so I find myself using lists and maps a lot, especially lists of lists, lists of maps, maps of lists, etc. In static languages (esp with Generics) you always have an idea of what yo...
For debugging, I would like to add some counter variables to my class. But it would be nice to do it without changing the header to cause much recompiling. If Ive understood the keyword correctly, the following two snippets would be quite identical. Assuming of course that there is only one instance. class FooA { public: FooA() : c...
I'm just starting to get my mind around this whole Object Oriented thing, so bear with me. So, I saw an example of an object function (for Javascript) where you assign a new value and that value gets assigned as that property's actual value. Example: function Meat (name, color, price) { function newPrice (new_price) { this....
I'm currently working on a computation in python shell. What I want to have is Matlab style listout where you can see all the variables that have been defined up to a point (so I know which names I've used, their values and such). Is there a way and how would one go in python about that ? ...
I am trying to use XSLT variables and not having much success, hopefully I'm just doing something dumb. I have the following code snippet: <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xalan="http://xml.apache.org/xslt" version="1.0"> <xsl:template match="/"> <xsl:variable name="config" select=...
Declaring a variable name, how much (if at all) impact does the length of its name have to the total memory of the application? Is there a maximum length anyway? Or are we free to elaborate on our variables (and instances) as much as we want? ...
In order to invoke the maven invoker plugin with the same goal that is currently running in my uber-pom, I need a way to pass the current goal into the invoker-plugin's config. Somethig like org.apache.maven.plugins maven-invoker-plugin ... ${maven.gaol} ....
Hi, I'm trying to mimic static variables on a JavaScript function, with the following purpose: $.fn.collapsible = function() { triggers = $(this).children('.collapse-trigger'); jQuery.each(triggers, function() { $(this).click(function() { collapse = $(this).parent().find('.collapse'); }) }) } How do I save the "co...
If I had: $foo= "12."bar bar bar"|three"; how would I insert in the text ".." after the text 12. in the variable? ...
I want to create a makefile variable that is a multi-line string (e.g. the body of an email release announcement). something like ANNOUNCE_BODY=" Version $(VERSION) of $(PACKAGE_NAME) has been released It can be downloaded from $(DOWNLOAD_URL) etc, etc" But I can't seem to find a way to do this. Is it possible? ...
How can I access an variable from another function? I have a function that sets and variable: private function create () { var str:String = "hello"; } private function take() { var message:String = str; } ...
I've been told that I shouldn't use variables such as params[:user_id] in my view files. Does the same rule apply to the session variable? If not, then what should I be doing? Assign it to an instance variable first and then use that in the view? This seems annoying as I would have to do it for each of my actions. I guess I could put t...
Here's a piece of code: $obj = new myClass(); $obj->{$_GET["func"]}($_GET["param"]) It works based on variable variables, but I don't really understand how. As far as I know, variable variables are used for stuff like this: require "dbsettings.php" $member_id = $_GET['id']; $db = new DBconnector(); $vars = array('username','passw','e...
What's the main problem if I don't declare the type of a variable? Like, Dim var1 versus Dim var1 as Integer. It can be anything so it should be good! ...
If I declare class variables in Objective-C, when is the memory released? If my interface is: @interface TestClass : NSObject { } + (NSString)instanceCount; @end And in the implementation, I declare: static NSString instanceCount; How do I release this class level variable? i.e. when is the dealloc called for class variables in ...
Hello, I am trying to install a program (a Java application) on my linux machine (I am using Slackware). I have received the following mistake, and I do not understand it. Could you advise me how to approach the problem? I am not sure whether this is a kind of question I could ask here, because it is not exactly a programming question, ...