carmensalas14 / capstone-higher-order-fluency-03

practice with arrays and json

Code Challenge: Higher Order Functions

Instructions

1. Clone down this assignment to your `code-challenges' directory in AWS Cloud9.
2. Code your solution using JavaScript in index.js.
3. Be sure to run and test your code throughly!
4. By the end of Code Challenge, commit regularly and push your changes up to Github.
5. Using the browser, verify that your solution is in your remote repo on Github.

Code Problems

All the following problems can be solved using a higher order array method. You cannot use .forEach() to solve the following problems.

Test all your solutions for questions 1-10 with the following variable:

const animals =['cheetah','dog', 'cat', 'dodobird', 'bear', 'dolphin']

1. Write a function named pluralize that takes an array of words that are singular and returns a new array of the same words pluralized.

   pluralize(animals) // ['cheetahs','dogs', 'cats', 'dodobirds', 'bears', 'dolphins']

2. Write a function named uppercase that takes an array of strings change every first letter in the string to uppercase.

   uppercase(animals) // ['Cheetah','Dog', 'Cat', 'Dodobird', 'Bear', 'Dolphin']

3. Write a function named longWords that takes an array of strings and returns only the strings with more than 3 letters

   longWords(animals) // ['cheetah', 'dodobird', 'bear', 'dolphin']

4. Write a function named shortWords that takes an array of strings return the strings with less than 5 letters

   shortWords(animals) // ['dog', 'cat', 'bear']

5. Write a function named oddLength that takes an array of strings and returns an array of just the words that have an odd number of characters:

   oddLength(animals) // ['cheetah','dog', 'cat', 'dolphin']

6. Write a function named longToShort that takes an array of strings, and sorts the array by string length in order of greatest to least

   longToShort(animals) //['cheetah','dog', 'cat', 'dodobird', 'bear', 'dolphin']

7. Write a function named noVowel that takes an array of strings and returns an array of strings where all of the vowels have been turned into an x.

   noVowel(animals) // ['chxxtxh', 'dxg', 'cxt', 'dxdxbxrd', 'bxxr','dxlphxn']

8. Write a function named concatStrings that takes an array of words and returns a sentence (single string) with all the element strings concatenated together

   concatStrings(animals) // "cheetah dog cat dodobird bear dolphin"

9. Write a function named allFour that takes an array of strings and returns true if all of the strings are a length of 4.

   allFour(animals) // false

10. Write a function named sum that takes an array of numbers and returns the sum of all the numbers in the array.

    const numbers = [22, 15, 1114, 416, 37, 4]
    sum(numbers) // 1608

Test all your solutions for the questions 1-4 with the following variable:

const alumni = [
{name:'Jarrit', job:'TPT',language:'JavaScript', age:23}, 
{name:'Stephanie', job:'JPMorgan',language:'JavaScript', age:24}, 
{name:'Devonte', job:'WW',language:'JavaScript', age:23}, 
{name:'Enmanuel', job:'Asana',language:'JavaScript', age:23},
{name:'Shemar', job:'SquareSpace',language:'JavaScript', age:23},
{name:'Cielo', job:'NYT',language:'JavaScript', age:22},
{name:'Carmen', job:'Marcy Lab School',language:'JavaScript', age:21},
{name:'Itzel', job:'Marcy Lab School',language:'JavaScript', age:22},
{name:'Ray', job:'Square Space',language:'JavaScript', age:21},
{name:'Jan', job:'Square Space',language:'JavaScript', age:22},
{name:'Uzma', job:'Thyme Care',language:'JavaScript', age:22}]

1. Write a function named oddJob that takes an array of objects and returns an array of objects if the job length is an odd number.

   oddJob(alumni) //returns [
     { name: 'Jarrit', job: 'TPT', language: 'JavaScript', age: 22 },
     { name: 'Enmanuel', job: 'Asana', language: 'JavaScript', age: 21 },
     {
       name: 'Shemar',
       job: 'SquareSpace',
       language: 'JavaScript',
       age: 23
     },
     { name: 'Cielo', job: 'NYT', language: 'JavaScript', age: 21 },
     { name:'Uzma', job:'Thyme Care',language:'JavaScript', age:22 }
   ]

2. Write a function named updateLanguage that takes an array of objects and updates the language value to ES6 if the language is JavaScript, return the entire object.

   updateLanguage(alumni) // [
     { name: 'Jarrit', job: 'TPT', language: 'ES6', age: 22 },
     { name: 'Stephanie', job: 'JPMorgan', language: 'ES6', age: 21 },
     { name: 'Devonte', job: 'WW', language: 'ES6', age: 23 },
     { name: 'Enmanuel', job: 'Asana', language: 'ES6', age: 21 },
     { name: 'Shemar', job: 'SquareSpace', language: 'ES6', age: 23 },
     { name: 'Cielo', job: 'NYT', language: 'ES6', age: 21 }
   ]

3. Write a function named orderedAlumni that takes an array of objects and sorts the objects by the age of the alumni from oldest to youngest.

   orderedAlumni(alumni) // returns [
     { name: 'Devonte', job: 'WW', language: 'JavaScript', age: 23 },
     {
       name: 'Shemar',
       job: 'SquareSpace',
       language: 'JavaScript',
       age: 23
     },
     { name: 'Jarrit', job: 'TPT', language: 'JavaScript', age: 22 },
     {
       name: 'Stephanie',
       job: 'JPMorgan',
       language: 'JavaScript',
       age: 21
     },
     { name: 'Enmanuel', job: 'Asana', language: 'JavaScript', age: 21 },
     { name: 'Cielo', job: 'NYT', language: 'JavaScript', age: 21 }
   ]

4. Write a function named averageAge that takes an array of objects and returns the average of all the ages from each age property in each object rounded to the nearest whole number.

   averageAge(alumni) // 22