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get dictionary value by key

... 10 Answers 10 Active ...
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How do I sort a vector of pairs based on the second element of the pair?

...response to your edits to your question, here's some thoughts ... if you really wanna be creative and be able to reuse this concept a lot, just make a template: template <class T1, class T2, class Pred = std::less<T2> > struct sort_pair_second { bool operator()(const std::pair<T1...
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iOS app error - Can't add self as subview

...ControllerDelegate protocol. This includes the following method, which is called after the animation is complete: navigationController:didShowViewController:animated: Basically you want to move some code as needed into this method to ensure that no other actions that could cause a change to the N...
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Why is Java Vector (and Stack) class considered obsolete or deprecated?

... each individual operation. That's almost never what you want to do. Generally you want to synchronize a whole sequence of operations. Synchronizing individual operations is both less safe (if you iterate over a Vector, for instance, you still need to take out a lock to avoid anyone else changing t...
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Knight's Shortest Path on Chessboard

... You have a graph here, where all available moves are connected (value=1), and unavailable moves are disconnected (value=0), the sparse matrix would be like: (a1,b3)=1, (a1,c2)=1, ..... And the shortest path of two points in a graph can be found usin...
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How can I make a UITextField move up when the keyboard is present - on starting to edit?

... isn't it batter to call -(void)setViewMovedUp:(BOOL)movedUp in keyBoardWillSHow and KeyBoardWillHide events!! – Abduliam Rehmanius Jun 26 '11 at 4:08 ...
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How to include view/partial specific styling in AngularJS

...with a better solution. UPDATE 1: Since posting this answer, I have added all of this code to a simple service that I have posted to GitHub. The repo is located here. Feel free to check it out for more info. UPDATE 2: This answer is great if all you need is a lightweight solution for pulling in s...
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Using Chrome, how to find to which events are bound to an element

...nel. Use a Mouse -> click breakpoint and then "step into next function call" while keeping an eye on the call stack to see what userland function handles the event. Ideally, you'd replace the minified version of jQuery with an unminified one so that you don't have to step in all the time, and use...
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How does Stack Overflow generate its SEO-friendly URLs?

...I benchmarked it). I figured I'd optimize it because this function can be called hundreds of times per page. /// <summary> /// Produces optional, URL-friendly version of a title, "like-this-one". /// hand-tuned for speed, reflects performance refactoring contributed /// by John Gietzen (user...
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Function for Factorial in Python

...factorial (available in Python 2.6 and above): import math math.factorial(1000) If you want/have to write it yourself, you can use an iterative approach: def factorial(n): fact = 1 for num in range(2, n + 1): fact *= num return fact or a recursive approach: def factorial(n...