最新下载
热门教程
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
string.substring();
时间:2022-06-30 09:57:17 编辑:袖梨 来源:一聚教程网
substring Method
Returns the substring at the specified location within a String object.
strVariable.substring(start, end)
"String Literal".substring(start, end)
Arguments
start
The zero-based index integer indicating the beginning of the substring.
end
The zero-based index integer indicating the end of the substring.
Remarks
The substring method returns a string containing the substring from start up to, but not including, end.
The substring method uses the lower value of start and end as the beginning point of the substring. For example, strvar.substring(0, 3) and strvar.substring(3, 0) return the same substring.
If either start or end is NaN or negative, it is replaced with zero.
The length of the substring is equal to the absolute value of the difference between start and end. For example, the length of the substring returned in strvar.substring(0, 3) and strvar.substring(3, 0) is three.
Example
The following example illustrates the use of the substring method.
function SubstringDemo(){
var ss; //Declare variables.
var s = "The rain in Spain falls mainly in the plain..";
ss = s.substring(12, 17); //Get substring.
return(ss); //Return substring.
}
Returns the substring at the specified location within a String object.
strVariable.substring(start, end)
"String Literal".substring(start, end)
Arguments
start
The zero-based index integer indicating the beginning of the substring.
end
The zero-based index integer indicating the end of the substring.
Remarks
The substring method returns a string containing the substring from start up to, but not including, end.
The substring method uses the lower value of start and end as the beginning point of the substring. For example, strvar.substring(0, 3) and strvar.substring(3, 0) return the same substring.
If either start or end is NaN or negative, it is replaced with zero.
The length of the substring is equal to the absolute value of the difference between start and end. For example, the length of the substring returned in strvar.substring(0, 3) and strvar.substring(3, 0) is three.
Example
The following example illustrates the use of the substring method.
function SubstringDemo(){
var ss; //Declare variables.
var s = "The rain in Spain falls mainly in the plain..";
ss = s.substring(12, 17); //Get substring.
return(ss); //Return substring.
}
相关文章
- 《夜族崛起》铁匠西里尔位置一览 05-17
- 《寓言之地》1.02更新内容一览 05-17
- 《辐射4》steam好评率介绍 05-17
- 《夜族崛起》技能强化珠宝掉落说明 05-17
- 《辐射4》主机控制台介绍 05-17
- 《星露谷物语》海草和绿藻获取方法 05-17