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JavaScript's functional programming helper library.
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define(['./_has', './_toPath'], function (_has, _toPath) {
// Shortcut function for checking if an object has a given property directly on
// itself (in other words, not on a prototype). Unlike the internal `has`
// function, this public version can also traverse nested properties.
function has(obj, path) {
path = _toPath(path);
var length = path.length;
for (var i = 0; i < length; i++) {
var key = path[i];
if (!_has(obj, key)) return false;
obj = obj[key];
}
return !!length;
}
return has;
});