Sep 8, 2011 · The findIndex() method returns the index of the first element in the array that satisfies the provided testing function. Otherwise -1 is returned. var fooArray = [5, 10, 15, 20, …

Jun 29, 2012 · If you're looking for index where peoples[index].attr1 == "john" use: var index = peoples.map(function(o) { return o.attr1; }).indexOf("john"); Explanation. Step 1. Use .map() to …

Apr 14, 2013 · while you can just loop through various ways to get the index, find Index is the best solution, even adopted in ES6 into native array methods – Kelly Milligan Commented Sep 3, …

Dec 27, 2013 · The .indexOf() method has an optional second parameter that specifies the index to start searching from, so you can call it in a loop to find all instances of a particular value:

Dec 21, 2016 · array.forEach(function (elem, i) { // iterate over all elements of array indexes[elem.id] = i; // take the found id as index for the }); // indexes array and assign i the …

Jun 6, 2017 · Find index of an element in javascript array of objects. 1. findIndex javascript problems. 1. Using Array ...

THIS is better than the answers above as it will break the loop upon first find rather than iterate the entire array and make a new array, ONLY to then perform the excise that is performed in …

Nov 23, 2011 · Array indexes in JavaScript start at zero for the first item, so try this: var firstArrayItem = myValues[0] Of course, if you actually want the second item in the array at …

Sep 17, 2012 · Another way (to aid @NullUserException and @Wexoni's comments) is to retrieve the object's index in the array and then go from there: var index = array.map(function(obj){ …

Jul 11, 2013 · To find the index of the greatest value in an array, copy the original array into the new array and then sort the original array in decreasing order to get the output [22, 21, 7, 0]; …