• Use map to transform an array
• Use filter to transform an array
• Use reduce to accumulate an array
• Use functions that return functions to abstract functionality
• Define higher order functions

To install

npm install

To run test

npm test

The tests are all passing, refactor the code without breaking the tests/

In array.map.js

• Create a function that transforms each value of the array before it gets pushed into result.
• Study the three main functions and determine what the similarities and differences are between them
• Create a function named map that abstracts the looping structure, it has as arguments, an array and a function
• Add the map function to all main functions
• Refactor using array.map, bring in helper functions as anonymous functions

In array.filter.js

• Create a function that checks to see if each value of the array should be pushed into result.
• Study the three main functions and determine what the similarities and differences are between them
• Create a function named filter that abstracts the looping structure, it has as arguments, an array and a function
• Add the filter function to all main functions
• Refactor using array.filter, bring in helper functions as anonymous functions

In array.reduce.js

• Create a function to transform each element for each function
• Study the three main functions and determine what the similarities and differences are between them
• Create a function named reduce that abstracts the looping structure, it has as arguments, an array, a function, and a startign value
• Add reduce function to all main functions
• Refactor using array.reduce, bring in helper functions as anonymous functions

In array.map.js

• From functions-return-functions use multiplyBy to abstract behavior on doubleNumbers
• From functions-return-functions use pluckProperty to abstract behavior on pluckName

In array.filter.js

• From functions-return-functions use notDivisibleBy to abstract behavior on onlyOdds
• In functions-return-functions, create a function named scoreBelow to abstract score number. Use it to abstract behavior in hasBelow30000CareerPoints
• In functions-return-functions, create a function named startsWith to abstract starting letter. Use it to abstract behavior in firstNameStartsWithA

In array.reduce.js

• rom functions-return-functions use groupByProperty to abstract behavior on groupByUniversity

• Turn you your neighbor and define what a higher order function is