JSFiddle - React, Tailwind, and code Playground

by mehulkar

JavaScript

Array.prototype.joinException = function(separator, exception) {
    var separator = separator || ",";
    var exception = exception || separator;
    
    var array = this.slice(0, -1);
    var result = array.join(separator);
    
    return result.concat(exception+this[this.length-1]);
};

console.log(["Hello", "World", "You"].joinException(", ", " and "));