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How to iterate for loop in reverse order in swift?

When I use the for loop in Playground, everything worked fine, until I changed the first parameter of for loop to be the highest value. (iterated in descending order) ...
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How can I convert a Unix timestamp to DateTime and vice versa?

There is this example code, but then it starts talking about millisecond / nanosecond problems. 19 Answers ...
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How can I quickly sum all numbers in a file?

I have a file which contains several thousand numbers, each on it's own line: 33 Answers ...
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How do you round a floating point number in Perl?

How can I round a decimal number (floating point) to the nearest integer? 13 Answers ...
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Two color borders

Client wants two color borders for an embossed look. Can I do this on one element? I was hoping to avoid stacking two DOM elements with individual borders. ...
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std::vector performance regression when enabling C++11

I have found an interesting performance regression in a small C++ snippet, when I enable C++11: 1 Answer ...
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Memoization in Haskell?

Any pointers on how to solve efficiently the following function in Haskell, for large numbers (n > 108) 8 Answers ...
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What's the fastest way to loop through an array in JavaScript?

I learned from books that you should write for loop like this: 22 Answers 22 ...
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How do I base64 encode (decode) in C?

I have binary data in an unsigned char variable. I need to convert them to PEM base64 in c. I looked in openssl library but i could not find any function. Does any body have any idea? ...
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Change Active Menu Item on Page Scroll?

As you scroll down the page, the active menu item changes. How is this done? 4 Answers ...