arrays.js

const getNthElement = (index, array) => {

return array[index % array.length]

};


const arrayToCSVString = array => {
  return (array.join());
};

const csvStringToArray = string => {
  return string.split(',');
}

const addToArray = (element, array) => {
const count= array.push(element);
console.log(array);
};

const addToArray2 = (element, array) => {
return array.concat(element);

};

const removeNthElement = (index, array) => {
  array.splice(index, 1);
  console.log(array);
};

const numbersToStrings = numbers => {
return numbers.map(String);
};

const uppercaseWordsInArray = strings => {
  return strings.map(function(x){return x.toUpperCase();})
};

const reverseWordsInArray = strings => {
return strings.map(string=> string.split("").reverse().join(""));
};


const onlyEven = numbers => {
 const onlyEven = numbers.filter(number => number % 2===0);
return onlyEven;
};

const removeNthElement2 = (index, array) => {
const NthElement2 = [...array];
  NthElement2.splice(index, 1);
   return NthElement2;
};

const elementsStartingWithAVowel = strings => {
  
  return strings.filter(strings=> /^[aeiou]/gi.test(strings));
};

const removeSpaces = string => {
  return string.split(" ").join("");
};

const sumNumbers = numbers => {
return sum = numbers.reduce((acc, number) => (acc + number));

  };

const sortByLastLetter = strings => {
  return strings.sort((a,b)=> a.charCodeAt(a.length-1)- b.charCodeAt(b.length-1));


};

module.exports = {
  getNthElement,
  arrayToCSVString,
  csvStringToArray,
  addToArray,
  addToArray2,
  removeNthElement,
  numbersToStrings,
  uppercaseWordsInArray,
  reverseWordsInArray,
  onlyEven,
  removeNthElement2,
  elementsStartingWithAVowel,
  removeSpaces,
  sumNumbers,
  sortByLastLetter
};