splice()函数详解

一、情况一(只有一个参数)

<script type="text/javascript">
	var array = [0,1,2,3,4,5,6]
	document.write("原数组为："+array + "<br />")
	array.splice(2)
	document.write("array.splice(2)的结果为：",array)
</script>

	var array = [0,1,2,3,4,5,6]
	document.write("原数组为："+array + "<br />")
	var result = array.splice(-3)
	document.write("array.splice(-3)的结果为：",array + "<br />")
	document.write("删除的内容为：",result)

二、情况二 (两个参数)

<script type="text/javascript">
	var array = [0,1,2,3,4,5,6]
	document.write("原数组为："+array + "<br />")
	var result = array.splice(2,1)
	document.write("array.splice(2,1)的结果为：",array + "<br />")
	document.write("删除的内容为：",result)
</script>

	var result = array.splice(2,0)
	document.write("array.splice(2,0)的结果为：",array + "<br />")
	document.write("删除的内容为：",result)

三、情况三 (大于等于三个参数)

1.1

<script type="text/javascript">
	var array = [0,1,2,3,4,5,6]
	document.write("原数组为："+array + "<br />")
	var result = array.splice(2,0,8,9)
	document.write("array.splice(2,0,8,9)的结果为：",array + "<br />")
	document.write("删除的内容为：",result)
</script>

1.2

	var result = array.splice(5,3,8,9)
	document.write("array.splice(2,0,8,9)的结果为：",array + "<br />")
	document.write("删除的内容为：",result)

2.1

<script type="text/javascript">
var array = [0,1,2,3,4,5,6]
document.write("原数组为："+array + "<br />")
var result = array.splice(-2,0,8,9)
document.write("array.splice(-2,0,8,9)的结果为：",array + "<br />")
document.write("删除的内容为：",result)
</script>

2.2

<script type="text/javascript">
	var array = [0,1,2,3,4,5,6]
	document.write("原数组为："+array + "<br />")
	var result = array.splice(-2,3,8,9)
	document.write("array.splice(-2,3,8,9)的结果为：",array + "<br />")
	document.write("删除的内容为：",result)
</script>

参考：
https://www.w3school.com.cn/jsref/jsref_splice.asp