Cheat Sheets for the Struggling Souls

5 min readSep 2, 2021

Let me cut to the chase and just say it. If you stop coding, you will forget!

As I reach my second to last phase of my bootcamp, I am realizing that my blood, sweat, and tears of work in the first two phases is slowly fading away. Even if I am coding in a secondary language(Ruby), I’m quite rusty in my oh-so-called primary language(Javascript). Although the logic being used to solve the problems will be present in all languages, I am forgetting what kind of methods, operators even existed.

Fear Not! There are plenty of refreshers available to you online, including mine. I will be covering some basic Javascript.

Arrays
Operations
If/Else Statements
String
Regular Expression
Math
a special present!

Arrays

let group = [“Leslie”, “Apoorva”, “Zach”]

let team = [“Yearim”, “Alec”, “Mari”]

let partners = [“Yi”, “Lex”, “Nathan”]

Array Methods:

pop() // removes the last element in an array, think of “Pop off”
group.pop() // [“Leslie”,”Apoorva”] *Bye Zach!
push() // adds a new element to the end of an array, think of “Push on”
group.push(“Zach”)//[“Leslie”,”Apoorva”,”Zach”] *Zach is back
shift() // removes the first element in an array
group.shift() // ["Apoorva”, "Zach"] *I'm leaving!
unshift() //adds a new element to the beginning of an array
group.unshift(“Leslie”)//[“Leslie”,”Apoorva”,”Zach”] *I'm back
slice(start, end) //returns a copy of an array from start to end of an index
partners.slice(1) // ["Lex", "Nathan"] partners.slice(-1) // ["Nathan"] partners.slice(0, 1) // ["Yi"] partners.slice(1, -1) // ["Lex"]
splice(where, how many?*, item list*) // add elements (where, how many to remove, element list) * is optional
team.splice(1, 0, “Apoorva”, “Zach”) // ["Yearim", "Apoorva", "Zach", "Alec", "Mari"]
sort() //sorts element alphabetically
team.sort() // [“Alec”,”Mari”,”Yearim”]
sort() //numeric sort
let nums = [1, 3, 6, 2, 5, 4] sort((a, b) => a - b)// [1,2,3,4,5,6]

Operators

Comparison Operators:

== Equal to 
=== Equal Value and Type
!= Not Equal to
!==Not Equal Value and Type
<=, >= less or equal, greater or equal

Logical Operators:

&& logical and 
|| logical or 
!  logical not

If/Else Statements

if (condition1 is true) { 
// run this code
} else if (condition2 is true) {
// run this 
} else {
//do this 
}

Switch Statements

switch (phase) {     
    case 1:                 // if (phase == 1)
	teacher = "Ix";          
	break;
    case 2:                 // if (phase == 2)
	teacher = "Louis";
	break;
    case 3:                 // if (phase == 3)
	teacher = "Dakota";
	break;
    case 4:                 // if (phase == 4)
	teacher = "Ix";
	break;    default:                // else...
	teacher = "Adam?";
}

String Methods

let string = “Potatoes”

let sentence = “Potatoes Underground”

charAt() //returns a character at the specified index
string.charAt(0) //”P”

split() //splits a string into an array of string, pattern provided in the parameter.
sentence.split(“ ") //[“Potatoes”,”Underground”]

replace() // find and replace specific text (once only, if a string)
sentence.replace(“Potatoes”, “Bananas”) // “Bananas Underground” string.replace(“o”, “0”) // “P0tatoes” string.replace(/o/g, “0”) // “P0tat0es”

startsWith() //checks if string starts with a characters specified string string.startsWith(“Pot”) //true

endsWith() //checks if string ends with a characters specified string string.endsWith(“toes”) //true

match(regex) //retrieves matches of string against the inserted string
string.match(/toe/) //[“toe”]

REGEX

I know this scares a lot of y’all. It scares me too, but we can’t be running away from it all the time!

Brackets

[.?!] // find any characters in the brackets

[^.?!] //find any characters not in the brackets

[0–9] //find any digits from 0–9

[A-Za-z] //find any character from uppercase A -Z to lowercase a-z

Pattern Modifiers

i // case insensitive
gm // global matching, multiple matches

Math Methods

abs(n) // return absolute value of n
Math.abs(-5) // 5

ceil(n) // value of n rounded up to the nearest integer

floor(n) // value of n rounded down to the nearest integer

max(x, y, z, n) // return the number with highest value
Math.max(8, 4, 3, 6) //8

min(x, y, z, n) //returns the number with lowest value

random() //returns a random number between 0 and 1

BONUS!!!!!

Don’t worry, we are almost there!
A lot of the times when we drive/navigate, I realize that some of my cohort-mates are missing out on some shortcuts, whether by choice or unawareness! So allow me to share some of my tricks!

*these are based on macs on the Browser

cmd + // zoom in
cmd- // zoom out
cmd 0 // original
ctrl tab // switch tabs within the window
cmd tab // switch through all opened apps

On visual studio code

shift + command + p // show command palette
option + d // multi select
option up/down arrow // move line up or down
command + / // toggling comment
command + n // new file
command + s // save file
command + w // close current window
command up/down arrow // beginning or end of file
control + ` // open vs code terminal

Terminal

control + l // clear terminal
control + u // delete everything from cursor position to the beginning of the line
control + a // move cursor to the beginning

Git Command

Have you ever cloned a lab instead of forking it and now you can’t push it up? Well, here are some commands that can save you from that situation!

First, go to the repo and fork → copy the SSH

git remote -v *check that the origin isn't your github
git remote remove origin 
git remote add origin *copy and paste the SSH
git remote -v *check your work and celebrate :D

If you want to redo a lab that you forked without physically deleting all the work?

git reset --soft HEAD~1 *remove last commit from the current branch
git restore *as an alternative to --soft you can do this
git reset --hard HEAD~1 you will lose all uncommited changes and all untracked files

Congratulations!
You actually scrolled down to the bottom of the article! Thanks for sticking around to the end. I hope this was helpful to you in some way!!!