Count the number of integers in a string

Question

how can I count the number of integers in a string using jQuery or javascript?

For example g66ghy7 = 3

Answer 1

I find this to look pretty/simple:

var count = ('1a2b3c'.match(/\d/g) || []).length

A RegExp will probably perform better (it appears):

var r = new RegExp('\\d', 'g')
  , count = 0

while(r.exec('1a2b3c')) count++;