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Find value in an array
...ing that you're trying to find if a certain value exists inside the array, and if that's the case, you can use Array#include?(value):
a = [1,2,3,4,5]
a.include?(3) # => true
a.include?(9) # => false
If you mean something else, check the Ruby Array API
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“Least Astonishment” and the Mutable Default Argument
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Actually, this is not a design flaw, and it is not because of internals, or performance.
It comes simply from the fact that functions in Python are first-class objects, and not only a piece of code.
As soon as you get to think into this way, then it completely ...
Best way to parse command line arguments in C#? [closed]
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I would strongly suggest using NDesk.Options (Documentation) and/or Mono.Options (same API, different namespace). An example from the documentation:
bool show_help = false;
List<string> names = new List<string> ();
int repeat = 1;
var p = new OptionSet () {
{ "n|name...
iterating over and removing from a map [duplicate]
... set is backed by the map, so changes to the map are reflected in the set, and vice-versa
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How do I capture SIGINT in Python?
I'm working on a python script that starts several processes and database connections. Every now and then I want to kill the script with a Ctrl + C signal, and I'd like to do some cleanup.
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Why do we need entity objects? [closed]
... think it comes down to how complicated the "logic" of the application is, and where you have implemented it. If all your logic is in stored procedures, and all your application does is call those procedures and display the results, then developing entity objects is indeed a waste of time. But for...
Things possible in IntelliJ that aren't possible in Eclipse?
I have heard from people who have switched either way and who swear by the one or the other.
41 Answers
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How to escape os.system() calls?
When using os.system() it's often necessary to escape filenames and other arguments passed as parameters to commands. How can I do this? Preferably something that would work on multiple operating systems/shells but in particular for bash.
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Can I load a .NET assembly at runtime and instantiate a type knowing only the name?
...t possible to instantiate an object at runtime if I only have the DLL name and the class name, without adding a reference to the assembly in the project? The class implements a interface, so once I instantiate the class, I will then cast it to the interface.
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How do I create an abstract base class in JavaScript?
...nction() {
throw new Error("Abstract method!");
}
The Animal "class" and the say method are abstract.
Creating an instance would throw an error:
new Animal(); // throws
This is how you "inherit" from it:
var Cat = function() {
Animal.apply(this, arguments);
// Cat initialization....