JSFiddle - React, Tailwind, and code Playground

by jimkennelly

JavaScript

String.prototype.endsWithLetter = function (searchString, position) {
        var subjectString = this.toString();
        if (typeof position !== 'number' || !isFinite(position) || Math.floor(position) !== position || position > subjectString.length) {
            position = subjectString.length;
        }
        position -= searchString.length;
        var lastIndex = subjectString.indexOf(searchString, position);
        return lastIndex !== -1 && lastIndex === position;
    };
    


    
    var b = "Phil";
    if (b.endsWithLetter("l")){
  		  alert("ends with an l");
    
    }
    alert(b);
    
    var aaaa = function(days) {
  var dat = new Date(this.valueOf());
  dat.setDate(dat.getDate() + 2 * days);
  return dat;
}


var xxx = function(days) {
  var dat = new Date(this.valueOf());
  dat.setDate(dat.getDate() + days);
  return dat;
}

Date.prototype.PhiladdDays = aaaa;
Date.prototype.JimaddDays  = xxx;


var dat = new Date();

alert(dat.PhiladdDays(5))
alert(dat.JimaddDays(5))