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delegate to ECMA5 native Array.isArray if available

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Mike Frawley
2010-02-22 14:37:54 -06:00
parent 5a5e14d7a4
commit b774bf7ca9
1 changed files with 3 additions and 2 deletions
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5
underscore.js
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@@ -415,7 +415,7 @@
// ------------------------- Object Functions: ------------------------------ // ------------------------- Object Functions: ------------------------------
// Retrieve the names of an object's properties. // Retrieve the names of an object's properties.
// ECMA5 has Object.keys(obj) in webkit nightlies // Delegates to ECMA5's native Object.keys
_.keys = Object.keys || function(obj) { _.keys = Object.keys || function(obj) {
if (_.isArray(obj)) return _.range(0, obj.length); if (_.isArray(obj)) return _.range(0, obj.length);
var keys = []; var keys = [];
@@ -526,7 +526,8 @@
}; };
// Is a given value an array? // Is a given value an array?
_.isArray = function(obj) { // Delegates to ECMA5's native Array.isArray
_.isArray = Array.isArray || function(obj) {
return !!(obj && obj.concat && obj.unshift); return !!(obj && obj.concat && obj.unshift);
}; };