D3 Examples - Array Uniq in coffee script JS Bin// source http://jsbin.com/xiwimo

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<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.jsdelivr.net/gh/lodash/lodash/3.0.1/lodash.min.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
​
<script id="jsbin-javascript">
var cls, curCls, i, key, nodeA, nodeB, res, value, _i, _ref;
​
nodeA = {
  className: 'txt-a txt-b bold center txt-a'
};
​
cls = 'add-cls';
​
curCls = nodeA.className.split(' ');
​
curCls.push(cls);
​
nodeA.className = _.uniq(curCls).join(' ');
​
console.log(nodeA);
​
nodeB = {
  className: 'txt-a txt-b bold center txt-a'
};
​
cls = 'add-cls';
​
curCls = nodeB.className.split(' ');
​
curCls.push(cls);
​
res = {};
​
for (i = _i = 0, _ref = curCls.length; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
  res[curCls[i]] = curCls[i];
}
​
curCls = (function() {
  var _results;
  _results = [];
  for (key in res) {
    value = res[key];
    _results.push(value);
  }
  return _results;
})();
​
nodeB.className = curCls.join(' ');
​
console.log(nodeA, nodeB, nodeA.className === nodeB.className);
​
</script>
​
​
​
<script id="jsbin-source-javascript" type="text/javascript">nodeA =
  className: 'txt-a txt-b bold center txt-a'
  
cls = 'add-cls'
  
curCls = nodeA.className.split(' ')
curCls.push(cls)
nodeA.className = _.uniq(curCls).join(' ')
​
console.log nodeA
​
nodeB =
  className: 'txt-a txt-b bold center txt-a'
  
cls = 'add-cls'
​
curCls = nodeB.className.split(' ')
curCls.push(cls)
res = {}
res[curCls[i]] = curCls[i] for i in [0...curCls.length]
​
curCls = for key, value of res then value
​
​
nodeB.className = curCls.join(' ')
​
console.log nodeA, nodeB , nodeA.className is nodeB.className
</script></body>
</html>
    