arrays - javascript indexOf() keeps returning -1 -
i have array this
var = [[1, 0], [3, 0], [5, 0], [7, 0]]; i running simple line of indexof(). however, keep getting -1 although test value i'm using exist in array.
var = a.indexof([1, 0]); console.log("index: ", i); did make mistake somewhere ?
you can use #findindex() , #every() find index of inner array inside outer array - see demo below:
var = [[1, 0], [3, 0], [5, 0], [7, 0]]; var search = [1,0]; // array index of 'a' var = a.findindex(function(n) { return search.every(function(p,q) { return p === n[q] }); }); console.log("index: ", i);and simpler es6 flavor:
var = [[1, 0], [3, 0], [5, 0], [7, 0]]; var search = [1, 0]; // array index of 'a' var = a.findindex(n => search.every((p, q) => p === n[q])); console.log("index: ", i);
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