8 lines
307 B
JavaScript
8 lines
307 B
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var canDistinguishSparseFromUndefined = 0 in [undefined]; // IE 6 - 8 have a bug where this returns false
|
||
|
|
|
||
|
|
module.exports = function isStringOrHole(item, index, arr) {
|
||
|
|
return typeof item === 'string' || (canDistinguishSparseFromUndefined ? !(index in arr) : typeof item === 'undefined');
|
||
|
|
};
|