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How do Third-Party “tracking cookies” work?
...Advertisers Use Third-Party Cookies?
on how third-party tracking cookies work, but am still very confused.
I don't understand how if I visit Website A (a normal website with ads) how Website B (an advertising website) can assign my computer an ID, and then figure out that I was on website A, and ot...
Algorithm to generate all possible permutations of a list?
Say I have a list of n elements, I know there are n! possible ways to order these elements. What is an algorithm to generate all possible orderings of this list? Example, I have list [a, b, c]. The algorithm would return [[a, b, c], [a, c, b,], [b, a, c], [b, c, a], [c, a, b], [c, b, a]].
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...key: value) is only useful if all of your Hash keys are "simple" symbols (more or less something that matches /\A[a-z_]\w*\z/i, AFAIK the parser uses its label pattern for these keys).
The :$in style symbols show up a fair bit when using MongoDB so you'll end up mixing Hash styles if you use MongoD...
How do I get time of a Python program's execution?
...
The simplest way in Python:
import time
start_time = time.time()
main()
print("--- %s seconds ---" % (time.time() - start_time))
This assumes that your program takes at least a tenth of second to run.
Prints:
--- 0.764891862869 seconds ---
...
iphone ios running in separate thread
... and compact:
dispatch_async( dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// Add code here to do background processing
//
//
dispatch_async( dispatch_get_main_queue(), ^{
// Add code here to update the UI/send notifications based on the
// resul...
javascript remove “disabled” attribute from html input
...y, the equivalent would be:
$('#my-input-id').prop('disabled', false);
For several input fields, you may access them by class instead:
var inputs = document.getElementsByClassName('my-input-class');
for(var i = 0; i < inputs.length; i++) {
inputs[i].disabled = false;
}
Where document co...
Boolean method naming readability
... question, from a readability standpoint, which method name do you prefer for a boolean method:
12 Answers
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Match whole string
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@Jake, I'm glad howards answer worked, but I think you should note it will only work when only abc is the only item in the string. For example, It would not match 'the first 3 letters in the alphabet are abc'
– matchew
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Is there any standard for JSON API response format?
Do standards or best practices exist for structuring JSON responses from an API? Obviously, every application's data is different, so that much I'm not concerned with, but rather the "response boilerplate", if you will. An example of what I mean:
...
how to get program files x86 env variable?
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On windows XP (x86) doesn't work, you need put %programfiles%. I think the only way is to check by code the OS version first and then use one variable or other.
– gsubiran
Feb 5 '14 at 16:12
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