My Solutions to Codewars Kata - 8kyu

8kyu

My Solutions to Codewars Kata - 8kyu

8kyu - Be Concise I The Ternary Operator (donaldsebleung).js

function describeAge(age) {
  return "You're a(n) " + (age < 13 ? "kid" : age < 18 ? "teenager" : age < 65 ? "adult" : "elderly");
}

8kyu - Broken Greetings (jhoffner).js

function Person(name) {
  this.name = name;
}
Person.prototype.greet = function(otherName) {
  return 'Hi ' + otherName + ', my name is ' + this.name;
}

8kyu - Convert Number to Reversed Array of Digits (emporio).js

function digitize(n) {
  return String(n).split('').map(Number).reverse();
}

8kyu - Count of Positives & Sum of Negatives (Dentzil).js

function countPositivesSumNegatives(input) {
  var sumNeg = 0;
  var countPos = 0;
  var final = [];
  if (input === null || input.length === 0) {
    return [];
  }
  for (var i = 0; i < input.length; i++) {
    if (input[i] < 0) {
      sumNeg = sumNeg + input[i];
    } else if (input[i] > 0) {
      countPos = countPos +1;  
    }
  }
  final[0] = countPos;
  final[1] = sumNeg;
  return final;
}

8kyu - Fun with ES6 Classes #1 People, People, People (donaldsebleung).js

class Person {
  constructor(firstName = 'John', lastName = 'Doe', age = 0, gender = 'Male') {
    this.firstName = firstName;
    this.lastName = lastName;
    this.age = age;
    this.gender = gender;
  }
  sayFullName() {
    return this.firstName + ' ' + this.lastName;
  } 
  static greetExtraTerrestrials(raceName) {
    return 'Welcome to Planet Earth ' + raceName;
  }  
}

8kyu - Grasshopper Basic Function Fixer (danleavitt0).js

function addFive(num) {
  var total = num + 5;
  return total;
}

8kyu - Invert Values (Slx64).js

function invert(array) {
  var inverted = []; 
  for (var i = 0; i < array.length; i++) {
    inverted.push(parseInt(-array[i]));
  }
  return inverted;
}

8kyu - Multiply.js

function multiply(a, b) {
  return a * b;
}

8kyu - Number of People in the Bus (aryan-firouzian).js

var number = function(busStops){
  var people = 0;
  for (var i = 0; i < busStops.length; i++) {
    people = people + busStops[i][0] - busStops[i][1];
  }
  return people;
}

8kyu - Simple Multiplication (grace555).js

function simpleMultiplication(x){
	if (x % 2 === 0) {
		x = x * 8;
	} else {
		x = x * 9;
	}
	return x;
}