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UICollectionView spacing margins

...tos. I have created the collectionview using UICollectionViewFlowLayout . It works good but I would like to have spacing on margins. Is it possible to do that using UICollectionViewFlowLayout or must I implement my own UICollectionViewLayout ? ...
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Android: Clear the back stack

In Android I have some activities, let's say A, B, C. 38 Answers 38 ...
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How to remove all the occurrences of a char in c++ string

... Basically, replace replaces a character with another and '' is not a character. What you're looking for is erase. See this question which answers the same problem. In your case: #include <algorithm> str.erase(std::remove(str.begin(), str.end(), 'a'), str.end...
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How to “inverse match” with regex?

I'm using RegexBuddy but I'm in trouble anyway with this thing :\ 9 Answers 9 ...
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Generate a random alphanumeric string in Cocoa

I want to call a method, pass it the length and have it generate a random alphanumeric string. 20 Answers ...
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join list of lists in python [duplicate]

Is the a short syntax for joining a list of lists into a single list( or iterator) in python? 15 Answers ...
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How to get all count of mongoose model?

... model that data has been saved? there is a method of Model.count() , but it doesn't seem to work. 8 Answers ...
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How to draw a custom UIView that is just a circle - iPhone app

How would I go about drawing a custom UIView that is literally just a ball (a 2D circle)? Would I just override the drawRect method? And can someone show me the code for drawing a blue circle? ...
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Running a Python script from PHP

... Tested on Ubuntu Server 10.04. I hope it helps you also on Arch Linux. In PHP use shell_exec function: Execute command via shell and return the complete output as a string. It returns the output from the executed command or NULL if an error occurred o...
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How do I merge two javascript objects together in ES6+?

I'm sick of tired of always having to write code like this: 6 Answers 6 ...