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Count the items from a IEnumerable without iterating?

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How to send an object from one Android Activity to another using Intents?

...objects around then Parcelable was designed for this. It requires a little more effort to use than using Java's native serialization, but it's way faster (and I mean way, WAY faster). From the docs, a simple example for how to implement is: // simple class that just has one member property as an e...
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What is the tilde (~) in the enum definition?

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How to find if a given key exists in a C++ std::map

...is only a single key in a std::map. So count will either be 0 or 1. Is one more efficient than the other? – goelakash Jul 17 '15 at 7:38 37 ...
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Most efficient way to make the first character of a String lower case?

...104102.578 ± 18705.805 ops/s The score are operations per second, the more the better. Tests test1 was first Andy's and Hllink's approach: string = Character.toLowerCase(string.charAt(0)) + string.substring(1); test2 was second Andy's approach. It is also Introspector.decapitalize() sugge...
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How to delete selected text in the vi editor

... use h, j, k and l to move left, down, up, right respectively, that's much more efficient than using the arrows) and type d to delete the selection. Also, how can I select the lines using my keyboard as I can in Windows where I press Shift and move the arrows to select the text? How can I do th...
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Can I use the range operator with if statement in Swift?

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How to do parallel programming in Python?

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Merging dictionaries in C#

What's the best way to merge 2 or more dictionaries ( Dictionary<T1,T2> ) in C#? (3.0 features like LINQ are fine). 2...
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How can I view a git log of just one user's commits?

...its commited (but not necessarily authored) by Adam, replace %an with %cn. More details about this are in my blog post here: http://dymitruk.com/blog/2012/07/18/filtering-by-author-name/ share | imp...