@aws/pdk
Version:
All documentation is located at: https://aws.github.io/aws-pdk
10 lines (6 loc) • 338 B
JavaScript
;
// TODO: semver-major: remove
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');
};