Nodejs String Char Set setCharAt(index, ch)

Method Source Code

String.prototype.setCharAt = function (index, ch){
    if (index > this.length || index < 0) return this;
    return this.substring(0, index) + ch + this.substring(index+1);
}

function convert(str){
    str = ' ' + str;
    var i = 0;// w  w  w . j a va  2 s. c om
    while (i < str.length){
        i++;
        if (str.charAt(i) !== ' '.charAt(0) && str.charAt(i-1) === ' '.charAt(0))
            if (str.charCodeAt(i) > 96 && str.charCodeAt(i) < 123)
                str = str.setCharAt(i, String.fromCharCode(str.charCodeAt(i) - 32));
    }
    return str.substring(1);
}

var str = 'the quick brown fox';

console.log(str);
console.log(convert(str));

Related

1. setCharAt(index, ch)

   String.prototype.setCharAt = function (index, ch){
       if (index > this.length || index < 0) return this;
       return this.substring(0, index) + ch + this.substring(index+1);
   function sortLetter(str){
       for (var i = 0; i < str.length; i++)
           for (var j = i+1; j < str.length; j++)
               if (str.charCodeAt(i) > str.charCodeAt(j)){
                   var t = str.charAt(i);
   ...
   

2. setCharAt(index, newValue)

   String.prototype.setCharAt = function (index, newValue) {
     return this.substring(0, index) + newValue + this.substring(index+1, this.length);
   };
   

3. setCharAt(index,chr)

   String.prototype.setCharAt = function(index,chr) {
     if(index > this.length-1) return str;
     return this.substr(0,index) + chr + this.substr(index+1);
   

4. setCharAt(index,chr)

   String.prototype.setCharAt = function(index,chr) { 
     if(index > this.length-1) return this;
     return this.substr(0,index) + chr + this.substr(index+1);