underscore.js - Determine if all values in an array of arrays match

Question

I have an array of arrays, which looks something like this:

[[\"Some string\", \"Some other string\"],[\"Some third string\", \"some fourth string\"]]
         


        

Answer 1

I can't comment on Dan Tao's answer, small change to skip checking of first array against itself (unnecessary _.difference call)

function allArraysAlike(arrays) {
    return _.all(arrays, function(array) {
        if(array === arrays[0]) return true;
        return array.length == arrays[0].length && _.difference(array, arrays[0]).length == 0;
    });
}