Each Character occurrence in a string

Question

How to write a javascript code that counts each character occurrence in a string ?

e.g 
String is : Hello World 

Output :  
count of H -> 1
count of e -&         


        

Answer 1

var splitWord = "Hello World".split('');
var letters = {};
for(var i in splitWord)
{
    var letter = splitWord[i];
    if(letter == ' ') continue;
    if(typeof letters[letter] == 'undefined')
    {
        letters[letter] = 0;
    }
    letters[letter]++;
}
console.dir(letters);