39 lines
867 B
JavaScript
39 lines
867 B
JavaScript
|
var Class = require('./Class');
|
||
|
|
var keys = require('./keys');
|
||
|
|
var isObj = require('./isObj');
|
||
|
|
exports = function(val, parents) {
|
||
|
|
if (!isObj(val)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
if (parents && parents.contains(val)) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
parents = new Node(val, parents);
|
||
|
|
var _keys = keys(val);
|
||
|
|
for (var i = 0, len = _keys.length; i < len; i++) {
|
||
|
|
if (exports(val[_keys[i]], parents)) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
};
|
||
|
|
|
||
|
|
var Node = Class({
|
||
|
|
initialize: function Node(val, next) {
|
||
|
|
this.val = val;
|
||
|
|
this.next = next;
|
||
|
|
},
|
||
|
|
contains: function(val) {
|
||
|
|
var cursor = this;
|
||
|
|
while (cursor) {
|
||
|
|
if (cursor.val === val) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
cursor = cursor.next;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
module.exports = exports;
|