Javascript : Get word after specific word?

Question

How to get a word after specific word?

For example: I have string like this :

string = "Price:$20 is very cheap" 

I want get result: $20

How can I do that with Javascript?

Answer 1

You can use regex:

var matches = /Price:(.*?) /g.exec("Price:$20 is very cheap");
if(matches.length > 1) {
    var price = matches[1];
}
else {
    // Not found
}

Note this will match any sequence of characters after the word Price: . If there is whitespace after the word price, it will break. If there is no space after $20, it will break. You need to make the rules more complex depending on your input source.

Answer 2

用：分隔字符串，然后用空格分隔。

string.split(":")[1].split(" ")[0]

Answer 3

Various solutions without regular expressions :

var s = 'Price:$20 is very cheap'; 
var s1 = s.slice(6, s.indexOf(' '));
var s2 = s.slice(s.indexOf(':') + 1, s.indexOf(' ')); 
var s3 = s.slice(s.indexOf('$'), s.indexOf(' '));
// s1 === s2 === s3 === "$20"

Answer 4

var str = 'Price:$20 is very cheap';
var price = str.split(' ')[0].split(':')[1]; // $20

Answer 5

var matches = /Price:(\$\d+)/.exec(string)
matches[1];//"$20"

Answer 6

You can use string.split(":")[1].split(" ")[0]

or else you can use combination of str.substring(); & str.indexOf(); .Fiddle example:

http://jsfiddle.net/PmcL3/

Answer 7

使用正则表达式是一种更好的方法，因为字符串方法不能在所有情况下都返回正确的答案。