<pre><code>var getWords = function(str) {
 var lastIndex = str.length - 1;

 if(str[0] === " ") {
 str = str.substring(1);
 }

 if(str[lastIndex] === " ") {
 str = str.substring(0, lastIndex);
 }

 return str.split(" ");
}

var data = ["avinash","supte"]
var dataLength = data.length;
var index= {};
for(var i=0;i&lt;dataLength;i++){
 var entry = data[i];
 if(entry === undefined){
 continue;
 }
 var str = getWords(entry);
 for(var j=0;j&lt;str.length;j++){
 var item = str[j];
 var itemLength = item.length - 1;
 var node = index;
 for(var n = 0; n &lt; itemLength; n++) {
 var char = item[n];
 var newNode = node[char];
 newNode = newNode === undefined ? {} : newNode;
 node[char] = newNode; // **
 node = newNode // i didn't understand what going on here
 }
 console.log(index)
 }
}
</code></pre>

```
var getWords = function(str) {
 var lastIndex = str.length - 1;

 if(str[0] === " ") {
 str = str.substring(1);
 }

 if(str[lastIndex] === " ") {
 str = str.substring(0, lastIndex);
 }

 return str.split(" ");
}

var data = ["avinash","supte"]
var dataLength = data.length;
var index= {};
for(var i=0;i<dataLength;i++){
		var entry = data[i];
		if(entry === undefined){
			continue;
		}
		var str = getWords(entry);
		for(var j=0;j<str.length;j++){
			var item = str[j];
			var itemLength = item.length - 1;
			var node = index;
	 	for(var n = 0; n < itemLength; n++) {
	 	var char = item[n];
	 	var newNode = node[char];
	 	newNode = newNode === undefined ? {} : newNode;
	 	node[char] = newNode; // **
	 	node = newNode // i didn't understand what going on here
	 	}
	 console.log(index)
		}
}

```

Can you please help me with this Javascript Code? Please check the comment -> // i didn't understand what going on here

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