http://www.w3schools.com/jsref/jsref_unshift.aspunshift 펑션은 배열의 0번째에 element를 새로 추가한다. 이때 기존값들은 자동적으로 index가 1 증가한다.Definition and Usage
The unshift() method adds one or more elements to the beginning of an array and returns the new length.
Syntax
arrayObject.unshift(newelement1,newelement2,....,newelementX) |
| Parameter | Description |
|---|
| newelement1 | Required. The first element to add to the array |
| newelement2 | Optional. The second element to add to the array |
| newelementX | Optional. Several elements may be added |
Tips and Notes
Note: This method changes the length of the array.
Note: The unshift() method does not work properly in Internet Explorer!
Tip: To add one or more elements to the end of an array, use the push() method.
Example
In this example we will create an array, add an element to the beginning of the array and then return the new length:
·미리보기 | 소스복사· - <script type="text/javascript">var arr = new Array();
arr[0] = "Jani"; - arr[1] = "Hege";
- arr[2] = "Stale";
document.write(arr + "<br />"); - document.write(arr.unshift("Kai Jim") + "<br />");
- document.write(arr);
</script>
|
The output of the code above will be:
Jani,Hege,Stale
4
Kai Jim,Jani,Hege,Stale |
