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Coalesce function for PHP?

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Regular Expression to match string starting with “stop”

...create a regular expression to match a word at the beginning of a string. We are looking to match stop at the beginning of a string and anything can follow it. ...
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Is there a vr (vertical rule) in html?

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Django templates: verbose version of a choice

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PostgreSQL database default location on Linux

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How to obtain Signing certificate fingerprint (SHA1) for OAuth 2.0 on Android?

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Not showing placeholder for input type=“date” field

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How can I get a list of all classes within current module in Python?

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Take a char input from the Scanner

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C# loop - break vs. continue

In a C# (feel free to answer for other languages) loop, what's the difference between break and continue as a means to leave the structure of the loop, and go to the next iteration? ...