@samnarduzzi/lotide/middle.js

Lotide proejct containf files, test code files, index, and descriptions for all files

const assertArraysEqual = require('./assertArraysEqual');


const middle = function(array) {
  if (array.length <= 2) {
    return [];
    // empty output for arrays that are less than 3 or <= 2
  } else if (array.length % 2 === 0) {
    return [array[array.length / 2 - 1], array[array.length / 2]];
    // for even arrays: returns first element at index (array.length / 2 - 1 ex. [1,2,3,4] --> 4/ 2 - 1 = 1,   4/ 2 = 2  --> returns 1st and 2nd index aka [2],[3]
    // and then returns second element at index (array.length / 2) 
  } else {
    return [array[Math.floor(array.length / 2)]];
    // for odd arrays: divides array length and rounds down to nearest interger ex. [1,2,3] --> 3/ 2 = 1.5 , round down to 1 --> returns 1st index aka [2]
  }
};
module.exports = middle;