Example code for my Good Code vs. Bad Code Flatiron School study group.

1ruby.md

Create a function that returns the sum of the two lowest positive numbers given an array of minimum 4 integers. No floats or empty arrays will be passed.

For example, when an array is passed like [19, 5, 42, 2, 77], the output should be 7.

[10, 343445353, 3453445, 3453545353453] should return 3453455.

Hint: Do not modify the original array.

2ruby.rb

# My Solution
def sum_two_smallest_numbers(numbers)
  sorted = numbers.sort
  sorted[0] + sorted[1]
end

# "Best Practice"
def sum_two_smallest_numbers(numbers)
  numbers.min(2).reduce(:+)
end

3javascript.md

Welcome. In this kata, you are asked to square every digit of a number.

For example, if we run 9119 through the function, 811181 will come out.

Note: The function accepts an integer and returns an integer

4javascript.js

// My Solution
function squareDigits(num){
  // Break the number up into an array
  const digits = ('' + num).split('')
  // Create a new empty array to store the squares
  let squared = []
  // Loop over array, square value & push into empty array
  for (let i = 0; i < digits.length; i++) {
    squared.push(digits[i] * digits[i])
  }
  // Join array and return the value
  return Number(squared.join(''))
}

// "Best Practice"
function squareDigits(num){
  return Number(('' + num).split('').map(function (val) { return val * val;}).join(''));
}