Get number of occurrences of a character in JavaScript [duplicate]

Answer 1

Remove the quotes and add the g flag:

var str = "This, is, another, word, followed, by, some, more";
var matches = str.match(/,/g);
alert(matches.length);    // 7

jsfiddle here: http://jsfiddle.net/jfriend00/hG2NE/