Nodejs String to Underscore underscore()

Method Source Code

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

Related

1. toUnderscore()

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

2. toUnderscore()

   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();});
   };
   

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.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
   };
   

7. underscore()

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

8. underscore()

   String.prototype.underscore = function() {
     return this.trim().toLowerCase().replace(/[\s]+/g, '_');
   

9. underscore()

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