Your suggestions for improvement are more than welcome at kumarashwini@outlook.com
Question 1. Make the following Javascript code work for any number of arguments and combinations
console.info(''+multiply(5, 6)); // 30
console.info(''+multiply(5)(6)); // 30
console.info(''+multiply(5, 2)(3)); // 30
console.info(''+multiply(5)(2)(3)); // 30
Question 2. What will be the following three outputs
var z={},
y={'0':'nice'},
x={'1':'nicer'};
z[y] = 0;
z[x] = 1;
console.log(z[y]);
console.log(z[x]);
console.log(z[y] === z[x]);
Question 3. How about the equality checks between the objects with the same content
var a = {'key': 'value'};
var b = {'key': 'value'};
console.info(a == b);
console.info(a === b);
Question 4. Let's implement a getUniqueId with auto incrementing in JS
getUniqueId(); // 1
getUniqueId(); // 2
getUniqueId(); // 3
Question 5. More Questions to be added... 😉
Solution 1.
var multiply = function() {
var currentResult = eval(Array.prototype.join.call(arguments, '*'));
multiply.lastResult = (multiply.lastResult ? (multiply.lastResult*currentResult) : currentResult);
return multiply;
};
multiply.toString = function() {
var temp = multiply.lastResult;
multiply.lastResult = null;
return temp;
};
//Test Cases
console.info(''+multiply(5, 6)); // 30
console.info(''+multiply(5)(6)); // 30
console.info(''+multiply(5, 2)(3)); // 30
console.info(''+multiply(5)(2)(3)); // 30
Solution 2.
var z={},
y={'0':'nice'},
x={'1':'nicer'};
z[y] = 0;
z[x] = 1;
console.log(z[y]); //1
console.log(z[x]); //1
console.log(z[y] === z[x]); //true
Solution 3.
var a = {'key': 'value'};
var b = {'key': 'value'};
console.info(a == b); // false
console.info(a === b); // false
Solution 4.
Option 1 - Let's thrill with overriding the function itself being inside the function 💀
var getUniqueId = function() {
var id = 0;
getUniqueId = function() {
return ++id;
};
return ++id;
};
getUniqueId(); // 1
getUniqueId(); // 2
getUniqueId(); // 3
Option 2 - Using IIFE
var getUniqueId = (function() {
var id = 0;
return function() {
return ++id;
};
})();
getUniqueId(); // 1
getUniqueId(); // 2
getUniqueId(); // 3