splice slice split

split:操作字符串变成字符串数组，stringObject.split(separator,howmany)。如：

<script type="text/javascript">
 var str="How are you doing today?"
 document.write(str.split(" ") + "<br />")
 document.write(str.split("") + "<br />")
 document.write(str.split(" ",3))
</script>
How,are,you,doing,today?
H,o,w, ,a,r,e, ,y,o,u, ,d,o,i,n,g, ,t,o,d,a,y,?
How,are,you

slice:从数组中提取指定字符串，arrayObject.slice(start,end)，start可以是负数，-1为最后一个元素，如果end没有指定，则截取到末尾，不改变原数组。如：

 <script type="text/javascript">
    var arr = new Array(6)
    arr[0] = "George"
    arr[1] = "John"
    arr[2] = "Thomas"
    arr[3] = "James"
    arr[4] = "Adrew"
    arr[5] = "Martin"
    document.write(arr.slice(2,4) + "<br />")
    document.write(arr.slice(1) + "<br />") 
    document.write(arr.slice(-3,-1) + "<br />") 
    document.write(arr.slice(-3,1) + "<br />")
    document.write(arr)
 </script>
 Thomas,James
 John,Thomas,James,Adrew,Martin
 James,Adrew
 
 George,John,Thomas,James,Adrew,Martin

splice：从数组中添加/删除项目，然后返回被删除的项目，改变原数组。arrayObject.splice(index,howmany,item1,.....,itemX)，前两个参数为必须的

<script type="text/javascript">
 var arr = new Array(6)
 arr[0] = "George"
 arr[1] = "John"
 arr[2] = "Thomas"
 arr[3] = "James"
 arr[4] = "Adrew"
 arr[5] = "Martin"
 document.write(arr + "<br />")
 arr.splice(2,3,"William")
 document.write(arr)
</script>
George,John,Thomas,James,Adrew,Martin
George,John,William,Martin