Find partial match in string

Question

I have the following line:

http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=1|4093F6|FFFFFF

I would like to find chld=1.

1 can be any number, and I need to change it.

How can I find chld=xwhere xany number stands for?

Answer 1

Here is a possible way:

var re = /chld=\d+/; 
var str = '"http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=1|4093F6|FFFFFF"';
document.getElementById("res").innerHTML = str.replace(re, "chld=100");

<div id="res"/>

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A regex chld=\d+that is very simple:

• chld=- Matches chld=string literal
• \d+ - Matches 1 or more digits.

chld s, , g var re = /chld=\d+/g;. \d [0-9]: var re = /chld=[0-9]+/g;. JavaScript \d [0-9] :

, . \d [0-9]. Unicode, \d . Java, JavaScript PCRE. Unicode ASCII \d.