Mnemonics Used

Evaluate the function and print the result = EFPR
Write a Function Which = WAFW

List your Node version

Run node -v

• It should be at least >=12

Variables

• Create a variable using var. EFPR. Attempt to modify it.
• Create a const variable. Attempt to modify its value. EFPR.

Functions and Lambdas

• WFW which returns the index you pass in plus 1. EFPR.
• WFW which adds the string "Tron" to a string parameter. EFPR.
• WFW which, given a string parameter, returns the last 3 characters of this string. EFPR.
• Higher Order Functions:
  • Create a function f which doubles a given index. EFPR.
  • Create a function g which halves a index. EFPR.
  • Create a function that accepts a index n, and returns n+2n or n+n/2 depending on whether you pass in f or g. EFPR.
• Simplify f and g to their lambda forms.

Looping and Recursing

• Create a function which returns the sum of numbers from 1 to n. EFPR.
• WFW goes into an infinite loop. EFPR.
• WFW returns the sum of numbers from 1 to n without using for. EFPR.

Data Structures: Arrays

• Print out the contents of an array numbers ([1,2,3,4,5,6,7,8,9,10]) with the string This is: before each element, using for.
• Do the same as above without using for.

Mapping

• WFW Double the elements of numbers. EFPR.
• WFW Find the remainder of all elements of numbers when divided by 2. EFPR.
• WFW Map numbers to ['a', 'aa', 'aaa', 'aaaa', 'aaaaa', 'aaaaaa', 'aaaaaaa', 'aaaaaaaa', 'aaaaaaaaa', 'aaaaaaaaaa']. EFPR.

Filtering

• WFW returns all the even elements of numbers. EFPR.
• WFW returns an array containing every alternate element of ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', ], like ['a', 'c', 'e', 'g', 'i']. EFPR.
• WFW finds the remainder of all elements of numbers when divided by 2. EFPR.
• WFW map numbers to ['a', 'aa', 'aaa', 'aaaa', 'aaaaa', 'aaaaaa', 'aaaaaaa', 'aaaaaaaa', 'aaaaaaaaa', 'aaaaaaaaaa']. EFPR.

Reducing

• WFW returns the sum of all numbers in an array of numbers. EFPR.
• Implement reduce using recursion. EFPR.

Data Structures: Objects

• Use this for reference:

const members = {
    "Duski": {
        nickname: "Grope Guru",
        age: 1
    },
    "Jess": {
        nickname: "Munted Bandit",
        age: 69
    },
    "Dexpair": {
        nickname: "Memelord",
        age: 420
    }
}

• Print out all the keys of members.
• Print out all the values of members.
• Print out all the entries of members.
• Print out Dexpair's entry in members.
• WFW adds 10 to every age in the object. EFPR.
• WFW adds 10 to every age in the object, without mutation. EFPR.

General Coding Guidelines

• Use const for declaring variables.
• Avoid mutating maps and arrays in general.
• Use good names for functions.
• Don't make your functions too long.