npm install asarrayConvert array-like objects to arrays
Have an array-like object, with a length property and integer properties 0 to length - 1,
but you want to use real array methods on it? Now you can:
var asarray = require('asarray');
var arr = asarray(obj);
and then Array.isArray(arr) is true, native methods like arr.forEach() (if available
on your platform) can be used, and so on. Effectively, asarray converts from an *implicit
interface* to a real array (reification?).
An example use case is iterating over a FileList from the W3C File API
or other array-like DOM elements using forEach or other useful array methods. Since FileList
is not an array these methods cannot normally be used directly.
Performance note: this module uses new Array(length) then sets each index
(initializing the array with [] then adding each element with .push() would be
20-70% slower). Also note, a new array is created
and copied; for large array-like objects this module may not be the best solution.
(Note this module should not to be confused with toarray,
which although also very useful, has a completely different purpose.)
MIT