Cacher is the code snippet organizer for pro developers

//input: typeof num === number
//output: Array<number>

function countBy(num) {
  const multiples = [];
  for(let i = 1; i <= 5; i++) {
    multiples.push(num * i);
  }
  return multiples;
}

console.log(countBy(5)); // [5, 10, 15, 20, 25];
console.log(countBy(10)); // [10, 20, 30, 40, 50];
console.log(countBy(1)); // [1, 2, 3, 4, 5];
console.log(countBy(4)); // [4, 8, 12, 16, 20];

function appendPlusOrMinus(grade) {
  const remainder = grade % 10;
  if (remainder >= 8) {
    return '+';
  }
  if (remainder <= 1) {
    return '-';
  }
  return '';
}

console.log(appendPlusOrMinus(89)); // right most digit is 9; returns: '+'
console.log(appendPlusOrMinus(91)); // right most digit is 1; returns: '-'
console.log(appendPlusOrMinus(77)); // right most digit is 7; returns: ''


// favoriteFruit = 'orange';

//input: Array<number>
//output: Array<number> with of 2 containing the input array's larget two numbers
function twoLargest(numbers) {
  const sortedArray = numbers.sort((a, b) => b - a);
  return [sortedArray[0], sortedArray[1]];
}

console.log(twoLargest([1, 5, 9, 7, 10, 2])); // [9, 10];
console.log(twoLargest([2, 4, 11, 3, 1, 20])); // [11, 20];
console.log(twoLargest([30, 1, 4, 2, 30, 0])); // [30, 30];
console.log(twoLargest([6, 5, 5])); // [5, 6];
console.log(twoLargest([1,2])); // [1, 2];)

function whoWillBeAtLeast30(people) {
  const endOfYear = new Date('December 31, 2018');
  const thirtyYears = (86400000 * 365) * 30;
  const peopleWhoWillBeAtLeast30 = []
  for (let person of people) {
    const { birthday: {month, day, year}, name} = person
    const birthday = new Date(`${month} ${day}, ${year}`);
    if( (endOfYear - birthday) >= thirtyYears ) {
      peopleWhoWillBeAtLeast30.push(name);
    }
  }
  return peopleWhoWillBeAtLeast30;
}

var people = [
 {name : 'Sarah', birthday : { month : 'June', day : 10, year : 1980}},
 {name : 'Alex', birthday : { month : 'August', day : 21, year : 1984}},
 {name : 'Chris', birthday : { month : 'December', day : 20, year : 1983}},
 {name : 'Kira', birthday : { month : 'October', day : 30, year : 1988}},
 {name : 'Ana', birthday : { month : 'Jan', day : 11, year : 1990}}
];

console.log(whoWillBeAtLeast30(people))