Question

How to extract all the numbers from a string include first and last index using regex in JavaScript

Answer 1

var s = "javascript01223c++3php500--9_8";
var pattern = /[0-9]+/g;
var match;
while ((match = pattern.exec(s)) != null) {
    document.write(match + ' : first index = ' +  match.index + 
                           ' - last index = ' + pattern.lastIndex + '<br />'); 
}
 
 
  
/*
run:
   
01223 : first index = 10 - last index = 15
3 : first index = 18 - last index = 19
500 : first index = 22 - last index = 25
9 : first index = 27 - last index = 28
8 : first index = 29 - last index = 30
      
*/

 

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