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Done both; factorial recursive may need revisit #48

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47 changes: 32 additions & 15 deletions recursion.js
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Original file line number Diff line number Diff line change
@@ -1,33 +1,50 @@
// to test these problems you can run 'node recursion.js' in your terminal
// Problem 1:

let n = 1;
while (n <= 10) {
console.log('While Loop', n);
n++;
}
// let n = 1;
// while (n <= 10) {
// console.log('While Loop', n);
// n++;
// }

// write a recursive - function called countToTen that mimics the while loop above.

// code here

// when you code is ready, un-comment the next line and run the file
// let n = 1;
// function countToTen() {
// if (n > 10) break; //base
// console.log(n);
// return countToTen(++n);
// };

// // when you code is ready, un-comment the next line and run the file
// console.log(countToTen());
/* ================ Next Problem ================= */



// Problem 2:

const factorial = n => {
let result = 1;
for (let i = 2; i <= n; i++) {
result *= i;
}
return result;
};
// const factorial = n => {
// let result = 1;
// for (let i = 2; i <= n; i++) {
// result *= i;
// }
// return result;
// };

console.log(factorial(5));
// console.log(factorial(5));

// write the above function in a recursive way.

let fact = 1;
let num = 2;
let n = 5;
function recursiveFactorial() {
if (num === n) return fact; // base
fact *= num;
return recursiveFactorial(num++)
}
// when your code is ready, un-comment the next line and run the file
// console.log(recursiveFactorial());
console.log(recursiveFactorial());
57 changes: 44 additions & 13 deletions this.js
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Original file line number Diff line number Diff line change
@@ -1,28 +1,59 @@
/* The for principles of "this";
* in your own words. explain the four principle for the "this" keyword below.
*
* 1.
* 2.
* 3.
* 4.
* 1. Window/Global Object Binding: When in the global scope, the value of “this” will be the window/console Object;
* 2. Implicit Binding: Whenever a function is called by a preceding dot, the object before that dot becomes 'this.
* 3. New Binding: When constructor function is used, object is created and returned by the constructor function.
* 4. Explicit binding: Whenever JavaScript’s call, apply or bind method is used, this is explicitly defined.
*
* write out a code example of each explanation above
*/

console.log('hello world!');

// Principle 1

// Principle 1 ==========
// code example for Window Binding
// function callWindow () {
// console.log(this);
// }
// callWindow();

// Principle 2

// Principle 2 ==========
// code example for Implicit Binding
// const computer = {
// gpu: 1,
// cpu: 2,
// motherboard: 1,
// cpuNumber: function () {
// console.log(this.cpu);
// }
// }
// computer.cpuNumber();

// Principle 3 ===========
// code example for New Binding

// Principle 3
// let Computer = function(gpu, cpu, motherboard) {
// this.gpu = gpu;
// this.cpu = cpu;
// this.motherboard = motherboard;
// }

// code example for New Binding
// let mike = new Computer('nvidia', 'i7', 'msi')
// let tom = new Computer('radeon', 'ryzen', 'gigabyte')

// Principle 4
// console.log(mike.gpu && mike.cpu);
// console.log(tom);

// Principle 4 ===============
// code example for Explicit Binding

let myComputer = {
gpu: 'nvidia',
cpu: 'intel',
motherboard: 'asus'
}

let saySpec = function() {
console.log('My computer has: ' + this.gpu + ' and ' + this.cpu + ' and ' + this.motherboard)
}

saySpec.call(myComputer);