Sep 17, 2012 · The find method invokes the function for every array element automatically, until a truthy value is returned. So if the function doesn’t return anything, the return value is undefined …

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, …

function isInArray(value, array) { return array.indexOf(value) > -1; } Execution: isInArray(1, [1,2,3]); // true Update (2017): In modern browsers which follow the ECMAScript 2016 (ES7) standard, …

It has a very sweet method on Arrays, .find. So you can find an element like this: array.find( {id: 75} ); You may also pass an object with more properties to it to add another "where-clause". …

May 5, 2012 · For finding the first element in an array which matches a boolean condition we can use the ES6 find() find() is located on Array.prototype so it can be used on every array. find() …

Here, there is no need to store the split elements in an array, and then get to the last element. If getting last element is the only objective, this should be used. Note: This changes the original …

The find() method returns a value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned. Side note: methods like find() and arrow …

Jun 29, 2012 · There's now a great way of doing this called findIndex which takes a function that return true/false based on whether the array element matches (as always, check for browser …

Pick the middle element of the remaining half of the array, and continue as in step 2, eliminating halves of the remaining array. Eventually you'll either find your element or have no array left to …

May 1, 2013 · Array .filter() with a nested call to .find() will return all elements in the first array that are members of the second array. Check the length of the returned array to determine if any of …