Javascript split, push and join

问题

How come the | is not added when I call the join method

    var array ="12|23|435|566|46|6|666766|24";
    var arraySplit = array.split("|");
    var newArray = [];
    for (i=0; i<arraySplit.length; i++)
    {
        if (arraySplit[i] < 500)
        {
            newArray.push(arraySplit[i]);
        }
    }
    newArray.join("|");
    alert(newArray);

回答1:

newArray.join does not modify the existing array. It returns a new string of all the array's current values, joined by the string you specify. Use the following to store the generated array in a new variable:

var joinedArray = newArray.join("|");
alert(joinedArray);

DEMO: http://jsfiddle.net/EH8dB/

---

References:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join

回答2:

You are not modifying newArray since join() returns a new object.

来源：https://stackoverflow.com/questions/12868756/javascript-split-push-and-join