Difference between find() and filter().shift() on javascript

Question

I recently starting to drop underscore/lodash overuse on (some of) my projects and realize that there\'s no full support of find method in browsers. What\'s the difference b

Answer 1

Use a polyfill; users.filter(function() { ... } ).shift(); is throwing cycles away while triggering unnecessary garbage collection.

• filter scans the entire array and creates another array
• shift now has to change all the indexes on the temp array

A slightly less wasteful pattern would be to use users.filter(function() { ... } )[0]

Answer 2

Apart from the obvious (and noticeable) overhead, yes, the results might vary. filter runs till the end of the array, and invokes its callback on every item; in contrast to find which stops after having found one. When the callback throws an exception on one of these additionally iterated elements, the outcome is different.
I don't see any good reason not to use find.