Nodejs String Starts With startsWith(s)

Here you can find the source of startsWith(s)

Method Source Code

String.prototype.startsWith = function (s) {
    if (this.substr(0, s.length) === s)
        return true;
    else//  w  w  w .j  a v  a  2  s.c o m
        return false;
}

Related

  1. startsWith(prefix)
    'use strict';
    var mime = require('mime');
    String.prototype.startsWith = function(prefix) {
      return this.indexOf(prefix) === 0;
    };
    String.prototype.endsWith = function(suffix) {
      return this.indexOf(suffix, this.length - suffix.length) !== -1;
    };
    
  2. startsWith(prefix)
    String.prototype.startsWith = function (prefix){
      return this.slice(0, prefix.length) == prefix;
    
  3. startsWith(prefix)
    String.prototype.startsWith = function(prefix)
      if(prefix == null)
        return false;
      if(this.length < prefix.length)
        return false;
      return this.substring(0, prefix.length) == prefix;
    };
    String.prototype.endsWith = function(suffix)
    ...
    
  4. startsWith(prefix)
    String.prototype.startsWith = function (prefix) {
      return this.substring(0, prefix.length) == prefix;
    };
    
  5. startsWith(prefix, ignoreCase)
    String.prototype.startsWith = function (prefix, ignoreCase) {
        var _prefix = prefix.source ? prefix.source : prefix.escapeRegExp();
        return this.match(new RegExp("^" + _prefix, ignoreCase ? 'i' : ''));
    };
    String.prototype.endsWith = function (suffix, ignoreCase) {
        var _suffix = suffix.source ? suffix.source : suffix.escapeRegExp();
        return this.match(new RegExp(_suffix + "$", ignoreCase ? 'i' : ''));
    };
    String.prototype.escapeRegExp = function() {
    ...
    
  6. startsWith(s)
    String.prototype.startsWith = function (s) {
      return (this.indexOf(s) === 0);
    
  7. startsWith(s)
    String.prototype.startsWith = function(s) {
        return (s === this.substr(0, s.length));
    
  8. startsWith(s)
    String.prototype.startsWith = function(s){
       return (this.indexOf(s)===0);
    
  9. startsWith(s)
    function nullOrEmpty(obj) {
        if (obj == null || obj.length == 0 || obj == 'undefined') {
            return true;
        return false;
    String.prototype.startsWith = function (s) {
        return (this.indexOf(s) == 0);
    };
    ...