Nodejs Utililty Methods String to Boolean Convert

String.prototype.toBool = function() {
    return (/^true$/i).test(this);
};

String.prototype.toBool = function()
  return this.toLowerCase() === 'true';
};

String.prototype.toBool = function() {
  switch(this.toLowerCase()) {
    case 'true': case 'yes': case '1': return true;
    case 'false': case 'no': case '0': case null: return false;
    default: return Boolean(this);
};

String.prototype.toBoolOrString = function () {
  return this === 'true' ? true : this === 'false' ? false : this.toString();
};

String.prototype.toBoolean = function () {
  return this == 'true';
};
String.prototype.isBoolean = function () {
  return this === 'true' || this === 'false';
};

String.prototype.toBoolean = function(){
  return Boolean(+this) || this.isYes();
};

String.prototype.toBoolean = function () {
    return (/^true$/i).test(this);
};

String.prototype.toBoolean = function () {
    if (this.valueOf())
        return new RegExp(/^(true)$|^(1)$|^(s){1}$/i).test(this.valueOf())
    return false;

String.prototype.toBoolean = function () {
    if (this && this.toLowerCase() === 'true') {
        return true;
    else {
        return false;
};