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PHP Regex to check date is in YYYY-MM-DD format
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App Inventor 2 中文网原创内容 · App Inventor 2 中文网
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App Inventor 2 中文网原创内容
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Why does 2 == [2] in JavaScript?
I recently discovered that 2 == [2] in JavaScript. As it turns out, this quirk has a couple of interesting consequences:
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Determining complexity for recursive functions (Big O notation)
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The time complexity, in Big O notation, for each function:
int recursiveFun1(int n)
{
if (n...
Big O, how do you calculate/approximate it?
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Regular expression that matches valid IPv6 addresses
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I was unable to get @Factor Mystic's answer to work with POSIX regular expressions, so I wrote...
Get operating system info
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The code below could explain in its own right, how http://thismachine.info/ is able to show wh...