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MySql Table Insert if not exist otherwise update

...me=[hash_name]) l limit 1; This example is cribbed from one of my databases, with the input parameters (two names and a number) replaced with [hasher_name], [hash_name], and [new_value]. The nested SELECT...LIMIT 1 pulls the first of either the existing record or a new record (last_recogs.id i...
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Should struct definitions go in .h or .c file?

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How to unset a JavaScript variable?

...y that unless your code is executed in an eval context (which most browser-based development consoles use), then variables declared with var cannot be deleted. 2. Without Using var When trying to assign a value to a name without using the var keyword, Javascript tries to locate the named reference i...
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GraphViz - How to connect subgraphs?

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Can mustache iterate a top-level array?

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Guava: Why is there no Lists.filter() function?

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How do I convert an existing callback API to promises?

...){ console.log(name) }) Promise can also be used on any platform that is based on Node.js like react-native. Bonus: An hybrid method (The callback method is assumed to have two parameters as error and result) function divisionAPI (number, divider, callback) { return new Promise(function (f...
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Passing a std::array of unknown size to a function

...known width... // I guess I could make it follow pointer semantics and rebase? Dunno // this being tricky, I am tempted to =delete operator= template<typename T, std::size_t N> contig_range( std::array<T, N>& arr ): _begin(&*std::begin(arr)), _end(&*std::end(arr)) {...
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What does !important mean in CSS?

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Given a number, find the next higher number which has the exact same set of digits as the original n

... At minimum, here are a couple of example brute force String based solutions, that you should have been able to come up with right off the top of your head: the list of digits in 38276 sorted is 23678 the list of digits in 38627 sorted is 23678 brute force increment, sort and compar...