JavaScript中join()、splice()、slice()和split()函数用法示例

<  type="text/ ">
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(
arr.join()
)
</ >

<  type="text/ ">
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(
arr.join(".")
)
</ >

<  type="text/ ">
var str="How are you doing today?"
document.write(str.split(" ") + "<br />")
document.write(str.split("") + "<br />")
document.write(str.split(" ",3))
</ >

"2:3:4:5".split(":") //将返回["2", "3", "4", "5"]
"|a|b|c".split("|") //将返回["", "a", "b", "c"]
"hello".split("") //可返回 ["h", "e", "l", "l", "o"]
"hello".split("", 3) //可返回 ["h", "e", "l"]

<  type="text/ ">
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(arr + "<br />")
document.write(
arr.slice(1)
 + "<br />")
document.write(arr)
</ >

<  type="text/ ">
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 />")
document.write(
arr.slice(2,4)
 + "<br />")
document.write(arr)
</ >

<  type="text/ ">
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(2,0,"William")
document.write(arr + "<br />")
</ >

<  type="text/ ">
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(2,1,"William")
document.write(arr)
</ >

<  type="text/ ">
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)
</ >