解析JavaScript中的某些字符串

Question

I have a string that looks like this: var string = "something/123/bah/234/id/835/param/2343";

I want to just target the "835" that I need from "id". Any quick ways to strip that out?

Answer 1

Split it; take the sixth object:

var string = "something/123/bah/234/id/835/param/2343"
var id = string.split("/")[5]; // "id" is 835 now

Or, if you want to get your id if it is located right after id/ and the location of id/ can change:

var string = "something/123/bah/234/id/835/param/2343".split("/");
var id = string[string.indexOf("id")+1]; // "id" is 835 now
if(id==string[0]){id="No ID found"} // ...that's just if id happens not to be in your string

Answer 2

如果您要提取的数字不一定是第六部分，但是您知道它在字符串id后面并且由数字组成，则可以使用正则表达式

var id_part = string.match(/id\/(\d+)/)[1]

Answer 3

如果网址将更改并且仅保留id但在其他位置，则可以使用regex：

var id = string.match(/id\/([^\/]+)/i)[1];

Answer 4

You could use a regex, and pull out the id from a capture group. This would grab the id no matter what the position.

var string = "something/123/bah/234/id/835/param/2343";
var regex = /\/id\/(\d+)\//g
var match = regex.exec(string)
alert(match[1]); // 835