regex to get the number from the end of a string
JavascriptRegexJavascript Problem Overview
i have a id like stringNumber variable like the one as follows : example12 I need some javascript regex to extract 12 from the string."example" will be constant for all id and just the number will be different.
Javascript Solutions
Solution 1 - Javascript
This regular expression matches numbers at the end of the string.
var matches = str.match(/\d+$/);
It will return an Array
with its 0
th element the match, if successful. Otherwise, it will return null
.
Before accessing the 0
member, ensure the match was made.
if (matches) {
number = matches[0];
}
If you must have it as a Number
, you can use a function to convert it, such as parseInt()
.
number = parseInt(number, 10);
Solution 2 - Javascript
RegEx:
var str = "example12";
parseInt(str.match(/\d+$/)[0], 10);
String manipulation:
var str = "example12",
prefix = "example";
parseInt(str.substring(prefix.length), 10);