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Data structure: insert, remove, contains, get random element, all at O(1)
...e keys are the elements in the data structure, and the values are their positions in the array.
insert(value): append the value to array and let i be its index in A. Set H[value]=i.
remove(value): We are going to replace the cell that contains value in A with the last element in A. let d be the la...
Bootstrap 3 Navbar Collapse
...increase the point at which the bootstrap 3 navbar collapses (i.e. so that it collapses into a drop down on portrait tablets)?
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static constructors in C++? I need to initialize private static objects
I want to have a class with a private static data member (a vector that contains all the characters a-z). In java or C#, I can just make a "static constructor" that will run before I make any instances of the class, and sets up the static data members of the class. It only gets run once (as the vari...
Fastest way to convert string to integer in PHP
...a quick benchmarking exercise:
Function time to run 1 million iterations
--------------------------------------------
(int) "123": 0.55029
intval("123"): 1.0115 (183%)
(int) "0": 0.42461
intval("0"): 0.95683 (225%)
(int) int...
How to get index of object by its property in JavaScript?
...ggest, looping through the array is probably the best way. But I would put it in it's own function, and make it a little more abstract:
function findWithAttr(array, attr, value) {
for(var i = 0; i < array.length; i += 1) {
if(array[i][attr] === value) {
return i;
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pythonic way to do something N times without an index variable?
...
A slightly faster approach than looping on xrange(N) is:
import itertools
for _ in itertools.repeat(None, N):
do_something()
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Intellij IDEA: Hotkey for “scroll from source”
...st IntelliJ IDEA, there is a keymap entry called "Select in Project View" with no default shortcut. Just add a shortcut key to it. No need for a plugin.
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Stateless and Stateful Enterprise Java Beans
...tain their state in between method calls, why is my program acting the way it is?
7 Answers
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Renaming a virtualenv folder without breaking it
I've created folder and initialized a virtualenv instance in it.
10 Answers
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Detect Click into Iframe using JavaScript
I understand that it is not possible to tell what the user is doing inside an iframe if it is cross domain. What I would like to do is track if the user clicked at all in the iframe . I imagine a scenario where there is an invisible div on top of the iframe and the the div will just then ...