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How to get all subsets of a set? (powerset)
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The Python itertools page has exactly a powerset recipe for this:
from itertools import chain, combinations
def powerset(iterable):
"powerset([1,2,3]) --> () (1,) (2,) (3,) (1,2) (1,3) (2,3) (1,2,3)"
s = list(iterable)
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Max parallel http connections in a browser?
...g some suspended connections to an HTTP server (comet, reverse ajax, etc). It works ok, but I see the browser only allows two suspended connections to a given domain simultaneously. So if a user is looking at my website in Tab1 of their browser, then also tries loading it in Tab2, they've used up th...
How to sort a collection by date in MongoDB?
I am using MongoDB with Node.JS. I have a collection which contains a date and other rows. The date is a JavaScript Date object.
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How to link to apps on the app store
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Edited on 2016-02-02
Starting from iOS 6 SKStoreProductViewController class was introduced. You can link an app without leaving your app. Code snippet in Swift 3.x/2.x and Objective-C is here.
A SKStoreProductViewControlle...
or (HTML5)
...of an AJAX page. Expect some sort of content change when clicking on a nav item.
menu is used for groups of controls (a, input, button). Generally this means the inputs should perform a function within the page. Expect some sort of javascript interaction when clicking on a menu item.
nav: the navi...
How to get folder path from file path with CMD
I need path to the folder that contains cmd file.
With %0 I can get file name. But how to get folder name?
7 Answers
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PHP Redirect with POST data
...some research on this topic, and there are some experts who have said that it is not possible , so I would like to ask for an alternative solution.
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Format Float to n decimal places
...follow
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edited Feb 1 '17 at 1:10
Tenfour04
29.9k66 gold badges4242 silver badges9090 bronze badges
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Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...The code...
options.get(something, doThisMostOfTheTime)()
...looks like it ought to be faster, but it's actually slower than the if ... elif ... else construct, because it has to call a function, which can be a significant performance overhead in a tight loop.
Consider these examples...
1.py
s...
How to know user has clicked “X” or the “Close” button?
...erClosing to know that the user had decided to close the form
but I guess it is the same for both clicking the X button or clicking the close button.
So how can I differentiate between these two in my code?
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