Swap rows with columns (transposition) of a matrix in javascript [duplicate] Swap rows with columns (transposition) of a matrix in javascript [duplicate] javascript javascript

Swap rows with columns (transposition) of a matrix in javascript [duplicate]


DuckDucking turned up this by Ken. Surprisingly, it's even more concise and complete than Nikita's answer. It retrieves column and row lengths implicitly within the guts of map().

function transpose(a) {    return Object.keys(a[0]).map(function(c) {        return a.map(function(r) { return r[c]; });    });}console.log(transpose([    [1,2,3],    [4,5,6],    [7,8,9]]));