split or explode?

How do you split a string in JavaScript?

mystring = "my dog ate my homework";

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var words = mystring.split(' ');

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returns an Array.

 

How do you determine the length of a string?

 

var stringlength = mystring.length;

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You're welcome.

 

I don't understand this. How do you put the string back together after you have split them? My intention is to sort out the words of 4 letters and under.

	var mySplitString = myNewString.split(" ");
	//if(mySplitString[i].length>4){
		for (j = 0; j < mySplitString[j].length; j++){
			if(j==0){
				document.getElementById('keyword0').innerHTML += mySplitString;
				getKeyURL+=mySplitString;
			}else{
				document.getElementById('keyword0').innerHTML += " " + mySplitString;
				getKeyURL+=" "+mySplitString;
			}
		}

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Your loop makes no sense.

var text = 'foo bar baz';
var words = text.split(' ');
for(var i = 0; i < words.length; i++) {
  // in this context, .length is the number of elements within an array
  // words[i] is the current word, do something with it
  if(words[i].length < 4) {
    // in this context, .length is the character count of a string
    // short word... 
  } else {
    // longer word...
    document.getElementById('keyword0').innerHTML += mySplitString + ' ';
  }
}

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To join pieces of array into string:

var string=array.join([ separator])//separator is optional

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rohan_shenoy, didn't you read his request?
He needs to filter out certain entries from his array, not join them all together.