var temp = "This is a string.";
var count = (temp.match(/is/g) || []).length;
console.log(count);
Output: 2
Explaination : The g in the regular expression (short for global) says to search the whole string rather than just find the first occurrence. This matches 'is' twice.var colors = ["Red", "Orange", "Blue", "Green"];
var colorsLength=colors.length;//4 is colors array length
var str = "bug";
var strLength=str.length;//3 is the number of characters in bug"this is foo bar".split("o").length - 1;
// returns 2function count (string) {
var count = {};
string.split('').forEach(function(s) {
count[s] ? count[s]++ : count[s] = 1;
});
return count;
}var str = "Hello World!";
var n = str.length; var str="hello";
var n str.lenbth;
console(n);