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WaitAll vs WhenAll

What is the difference between Task.WaitAll() and Task.WhenAll() from the Async CTP ? Can you provide some sample code to illustrate the different use cases ? ...
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php var_dump() vs print_r()

What is the difference between var_dump() and print_r() in terms of spitting out an array as string? 12 Answers ...
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UITextField border color

...rtzCore framework in you class: #import <QuartzCore/QuartzCore.h> and for changing the border color use the following code snippet (I'm setting it to redColor), textField.layer.cornerRadius=8.0f; textField.layer.masksToBounds=YES; textField.layer.borderColor=[[UIColor redColor]...
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Immutable class?

How can one make a Java class immutable, what is the need of immutability and is there any advantage to using this? 13 Answ...
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Best Practice - NSError domains and codes for your own project/app

...ameworks, but what is the best practice regarding setting up error domains and custom error codes for your own project/app ? ...
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What are these ^M's that keep showing up in my files in emacs?

So I think it may have to do with textmate, but we work in a small team and are having some issues with full-file conflicts of nearly identical files in git because each line of one branch has a ^M appended to it. ...
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Django CharField vs TextField

What is the difference between CharField() and TextField() in Django? The documentation says that CharField() should be used for smaller strings and TextField() should be used for larger strings. Okay, but where is the line drawn between "small" and "large"? What's going on under the ho...
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How can I remove non-ASCII characters but leave periods and spaces using Python?

...rom the file with no non-ASCII characters. However, I want to leave spaces and periods. At present, I'm stripping those too. Here's the code: ...
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Efficiency of purely functional programming

... Pippenger [1996], when comparing a Lisp system that is purely functional (and has strict evaluation semantics, not lazy) to one that can mutate data, an algorithm written for the impure Lisp that runs in O(n) can be translated to an algorithm in the pure Lisp that runs in O(n log n) time (based on ...
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What is duck typing?

I came across the term duck typing while reading random topics on software online and did not completely understand it. 1...