Day 8 30 Days of Leetcode Challange

/**
 * @return {Function}
 */
var createHelloWorld = function() {

    return function(...args) {
        return "Hello World"
    }
};

/**
 * const f = createHelloWorld();
 * f(); // "Hello World"
 */

/**
 * @param {number} n
 * @return {Function} counter
 */
var createCounter = function(n) {

    return function() {
        return n++
    };
};

/** 
 * const counter = createCounter(10)
 * counter() // 10
 * counter() // 11
 * counter() // 12
 */

/**
 * @param {string} val
 * @return {Object}
 */
var expect = function(val) {

return{   
  toBe:(data)=>{
    if(val===data) return true
    else throw new Error("Not Equal") 
  },

   notToBe:(data)=>{
    if(val !== data) return true
    else throw new  Error("Equal")
  }
  }

};

/**
 * expect(5).toBe(5); // true
 * expect(5).notToBe(5); // throws "Equal"
 */

/**
 * @param {integer} init
 * @return { increment: Function, decrement: Function, reset: Function }
 */
var createCounter = function(init) {
    let currentcount = init 
       return{
        increment:()=>{
            return ++currentcount
        },
        reset:()=>{
            return currentcount = init
        },
        decrement:()=>{
            return --currentcount
        }
    }
};

/**
 * const counter = createCounter(5)
 * counter.increment(); // 6
 * counter.reset(); // 5
 * counter.decrement(); // 4
 */