Javascript 从最后一个斜杠拆分变量 - jquery
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Split variable from last slash - jquery
提问by blasteralfred Ψ
I have a variable var1/var2/var3. I want to store var3the part after last slash in a variable and the part before that (var1/var2/) in another variable. How can I do this?
我有一个变量var1/var2/var3。我想将var3最后一个斜杠之后的部分存储在一个变量中，并将 ( var1/var2/)之前的部分存储在另一个变量中。我怎样才能做到这一点？
回答by Mark Coleman
You can use lastIndexOfto get the last variable and that to get the rest.
您可以使用lastIndexOf获取最后一个变量，然后使用它来获取其余变量。
var rest = str.substring(0, str.lastIndexOf("/") + 1);
var last = str.substring(str.lastIndexOf("/") + 1, str.length);
Example on jsfiddle.
var str = "var1/var2/var3";
var rest = str.substring(0, str.lastIndexOf("/") + 1);
var last = str.substring(str.lastIndexOf("/") + 1, str.length);
console.log(rest);
console.log(last);回答by Chandu
Try something like this:
尝试这样的事情：
var vars = "var1/var2/var3";
var arrVars = vars.split("/");
var lastVar = arrVars.pop();
var restVar = arrVars.join("/");
alert(lastVar);
alert(restVar);
回答by Bheru Lal Lohar
var last = url.split("/").pop();
console.log(last);
You can get last piece of url with array pop method.
您可以使用数组 pop 方法获取最后一段 url。
回答by AlexC
var txt = "var1/var2/var3";
txt = txt.split('/')
var Var1 = txt.pop();
var Var2 = txt[0]+'/'+txt[1];
alert(Var1);
alert(Var2);
回答by Rion Williams
You can use a split and then pull the last index of it, like so :
您可以使用拆分然后拉出它的最后一个索引，如下所示：
Example:
例子：
var string = 'var1/var2/var3';
var result = string.split('/'); //Splits into an array
//var final = result[result.length -1]; //Grabs last value
//result.pop(); //Removes last value
var final = result.pop(); //Removes last value and grap the last value
var previous = result.join('/'); //Grabs the previous part
alert("Previous: " + previous + ", Final Part: " + final); //Alerts results
Demo:
演示：
回答by Shailesh Sonare
string.substring(start,end)
string.substring（开始，结束）
where
在哪里
start = Required. The position where to start the extraction. First character is at index 0
开始 = 必需。开始提取的位置。第一个字符位于索引 0
end = Optional. The position (up to, but not including) where to end the extraction. If omitted, it extracts the rest of the string
结束 = 可选。结束提取的位置（最多但不包括）。如果省略，则提取字符串的其余部分
var string = "var1/var2/var3";
start = string.lastIndexOf('/'); //console.log(start); o/p:- 9
end = string.length; //console.log(end); o/p:- 14
var string_before_last_slash = string.substring(0, start);
console.log(string_before_last_slash);//o/p:- var1/var2
var string_after_last_slash = string.substring(start+1, end);
console.log(string_after_last_slash);//o/p:- var3
OR
或者
var string_after_last_slash = string.substring(start+1);
console.log(string_after_last_slash);//o/p:- var3
回答by RedClover
Solution using regex, might not be the fastest, but takes less space and might be more readable.
使用正则表达式的解决方案可能不是最快的，但占用的空间更少并且可能更具可读性。
"var1/var2/var3".split(/\/(?=[^\/]+$)/)
\/– Match a slash(?=– If it's followed by[^\/]+– Anything but slashes.$– And the end of the string
)
\/– 匹配斜线(?=– 如果后面跟着[^\/]+– 除了斜线之外的任何东西。$– 以及字符串的结尾
)
回答by lukastymo
The simplest solution is to use javascript:
最简单的解决方案是使用 javascript：
var str = "var1/var2/var3/var4/var5";
var splitted = str.split("/");
var first = "";
for (var i=0; i<splitted.length-1; i++) {
first += splitted[i] + "/";
}
var second = "";
if (splitted.length > 0) {
second = splitted[splitted.length-1];
}
alert(first); // var1/var2/var3/var4/
alert(second); // var5
edited:
but the shortest solution will be: substring()use
编辑：但最短的解决方案是：substring()使用
