This character appears in the string to determine how many times

/ * 
    Find the string appeared many times each string 
    * / 

    var str = "ON the depend the If you Life and Death, the I by Will Never give up." // The first step is unified uppercase and lowercase letters var newStr = str .toLocaleLowerCase (); // second step creates an empty object, purpose: as the letter keys, the number of times as the value of var obj = {}; //   third obtaining step through each letter string for ( var I = 0; I <newStr.length; I ++ ) {
         var key = newStr [I];   // for each letter IF (obj [key]) {   // is determined that no key has obj // object has the letter of 
            obj [key ] ++ 
        } the else {
             //

    
    

    
    

    
    
        
        The letter no object, then the object is added to the letter, and the letter a number of times to appear, a default 
            obj [Key] =. 1 ; 
        } 
    }     
    // traverse the object, displays the number of each object 
    for ( var Key in obj) { 
        the console.log (Key + "appears the letter" + obj [key] + "views" ); 
    }