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How to replace an item in an array with Javascript?

... var index = items.indexOf(3452); if (index !== -1) { items[index] = 1010; } Also it is recommend you not use the constructor method to initialize your arrays. Instead, use the literal syntax: var items = [523, 3452, 334, ...
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How do I expand a tuple into variadic template function's arguments?

...o a variadic template function. Here is a small helper class which creates index array. It is used a lot in template metaprogramming: // ------------- UTILITY--------------- template<int...> struct index_tuple{}; template<int I, typename IndexTuple, typename... Types> struct make_ind...
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#1071 - Specified key was too long; max key length is 1000 bytes

... As @Devart says, the total length of your index is too long. The short answer is that you shouldn't be indexing such long VARCHAR columns anyway, because the index will be very bulky and inefficient. The best practice is to use prefix indexes so you're only indexin...
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How to check if an element is in an array

...w to check for this? I know that there is a method find that returns the index number, but is there a method that returns a boolean like ruby's #include? ? ...
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How do I show the changes which have been staged?

...just be: git diff --cached --cached means show the changes in the cache/index (i.e. staged changes) against the current HEAD. --staged is a synonym for --cached. --staged and --cached does not point to HEAD, just difference with respect to HEAD. If you cherry pick what to commit using git add --...
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Querying DynamoDB by date

... Updated Answer: DynamoDB allows for specification of secondary indexes to aid in this sort of query. Secondary indexes can either be global, meaning that the index spans the whole table across hash keys, or local meaning that the index would exist within each hash key partition, thus re...
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What's the difference between SortedList and SortedDictionary?

...+----------+--------+----------+----------+---------+ | Collection | Indexed | Keyed | Value | Addition | Removal | Memory | | | lookup | lookup | lookup | | | | +------------------+---------+----------+--------+----------+----------+--------...
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Permutations in JavaScript?

...input) { function permutate(array, callback) { function p(array, index, callback) { function swap(a, i1, i2) { var t = a[i1]; a[i1] = a[i2]; a[i2] = t; } if (index == array.length - 1) { callback(a...
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Why does MYSQL higher LIMIT offset slow the query down?

... it's talking so long. By the trick you provided, only matched ids (by the index directly) are bound, saving unneeded row lookups of too many records. That did the trick, hooray! – Rahman Dec 27 '10 at 15:08 ...
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In plain English, what does “git reset” do?

...urrent branch and reset it to point somewhere else, and possibly bring the index and work tree along. More concretely, if your master branch (currently checked out) is like this: - A - B - C (HEAD, master) and you realize you want master to point to B, not C, you will use git reset B to move it t...