javascript - Algorithm for returning common items in multiple arrays -

javascript - Algorithm for returning common items in multiple arrays -

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simplest code array intersection in javascript 20 answers

what efficient way homecoming mutual elements between multiple big arrays? arrays contain strings, knowing how generically nice too.

for example, input of ['a', 'b'], ['a', 'b', 'c'], ['b', 'c'] should homecoming ['b'].

it depends on comparing... if it's alphabet letters create arrays have 26 slots (1 each alphabet letter) , give them values of 0 (that letter not in list) or 1 (the letter in list)... compile (add) matrices together, let's have 5 arrays... slots value 5 mean slot had 1 in 5 arrays, therefor letter showed in 5 arrays.

javascript algorithm