I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence...
I’ve noticed the following code is legal in Python. My question is why? Is there a specific reason? n = 5 while n != 0: print n n -=...
The ObjectiveC.swift file from the standard library contains the following few lines of code around line 228: extension NSObject : Equatable, Hashable { /// ... open var hashValue: Int...
I find it more convenient to access dict keys as obj.foo instead of obj['foo'], so I wrote this snippet: class AttributeDict(dict): def __getattr__(self, attr): return self[attr] def __setattr__(self, attr,...
One of the tips for jslint tool is: ++ and -- The ++ (increment) and -- (decrement) operators have been known to contribute to bad code by encouraging excessive...
How do you express an integer as a binary number with Python literals? I was easily able to find the answer for hex: >>> 0x12AF 4783 >>> 0x100 256...
How do I make Python dictionary members accessible via a dot “.”? For example, instead of writing mydict['val'], I’d like to write mydict.val. Also I’d like to access nested...
Summary Can you explain the reasoning behind the syntax for encapsulated anonymous functions in JavaScript? Why does this work: (function(){})(); but this doesn’t: function(){}();? What I know In JavaScript,...
Recently I’ve seen an example like the following: #include <iostream> class Foo { public: int bar; Foo(int num): bar(num) {}; }; int main(void) { std::cout << Foo(42).bar << std::endl;...
In Python, I’ve seen two variable values swapped using this syntax: left, right = right, left Is this considered the standard way to swap two variable values or is...