Nodejs String to Underscore toUnderscore()

Method Source Code

function getId(obj){
  return parseInt($(obj).attr('id').split("-").pop(), 10);
}

String.prototype.toUnderscore = function(){
  return this.replace(/([A-Z])/g, function($1){return "_"+$1.toLowerCase();});
};

Related

1. toUnderscore()

   String.prototype.toUnderscore = function(){
     return this.charAt(0).toLowerCase() + this.substring(1).replace(/([A-Z])/g, function($1){return "_"+$1.toLowerCase();});
   };
   console.log(process.argv[2].toUnderscore());
   

2. toUnderscore()

   String.prototype.toUnderscore = function(){
     return this.replace(/([A-Z])/g, function($1){return "_"+$1.toLowerCase();});
   };
   

3. toUnderscore()

   String.prototype.toUnderscore = function() {
     return this.replace(/(^[A-Z])/, function(match) {
       return match.toLowerCase();
     }).replace(/([A-Z])/g, function(match){
       return "_" + match.toLowerCase();
     });
   };
   

4. toUnderscore()

   String.prototype.toUnderscore = function() {
     var str = this.replace(/[A-Z]/g, function(s) {
       return "_" + s.toLowerCase();
     });
     while (str.charAt(0) === '_') {
       str = str.slice(1);
     return str;
   };
   ...
   

5. toUnderscore()

   String.prototype.toUnderscore = function() {
     var str = this;
     var modified = '';
     for (var i = 0; i < str.length; i++) {
       if (isLower(str[i])) {
         modified += str[i];
       } else {
         if (str.length > i-1) {
           if (isLower(str[i-1])) {
   ...
   

6. underscore()

   String.prototype.underscore = function() {
     return this.replace(/([a-z\d])([A-Z]+)/g, '$1_$2').replace(/[-\s]+/g, '_').toLowerCase();
   };