Open MichaelMugaiga opened 1 year ago
All is okay at the moment
I decided to go back to the start of inside.js re-read all material and redo the exercises because the previous 2 weeks i was so engaged with language school exam preparation and work which limited my time for practicing.
The more practice you do the more familiar and easy to understand code will be
I just want to let you know that the arrays keep messing with my head but i will continue to practice using different exercises and come through in case i find anything that is not clear.
Doing exercises shared by Ibrahim. They were very helpful in understanding arrays and the arrow functions.
Interpreting the exercise questions to start writing code takes me a bit of time.
Using for-each, filter, map, reduce and indexOf array instances.
Thanks to the coaches, Ibrahim, Ufuk and Tugba. Coach Ibrahim, i appreciate the encouraging, motivating words you share. So uplifting. thank you very much.
Learning Objectives
Priorities: 🥚, 🐣, 🐥, 🐔 (click to learn more)
There is a lot to learn in this repository. If you can't master all the material at once, that's expected! Anything you don't master now will always be waiting for you to review when you need it. These 4 emoji's will help you prioritize your study time and to measure your progress: - 🥚: Understanding this material is required, it covers the base skills you'll need to move on. You do not need to finish all of them but should feel comfortable that you could with enough time. - 🐣: You have started all of these exercises and feel you could complete them all if you just had more time. It may not be easy for you but with effort you can make it through. - 🐥: You have studied the examples and started some exercises if you had time. You should have a big-picture understanding of these concepts/skills, but may not be confident completing the exercises. - 🐔: These concepts or skills are not necessary but are related to this module. If you are finished with 🥚, 🐣 and 🐥 you can use the 🐔 exercises to push yourself without getting distracted from the module's main objectives. ---
0. Asserting
let
vs.const
: You can explain the differences betweenlet
andconst
including: uninitialized declarations and reassignment. You can determine when a variable can be assigned withconst
in a program.===
and!==
operators compare strings, and can predict the result of any string comparison.console.log
: You can useconsole.log
to create program traces in the console, and to print other helpful info for developers.console.assert
: You can use theconsole.assert
for assertion testing, and can write a helpful message assertion message.1. Primitives and Operators
typeof
: You can predict thetypeof
operator's output for values from any of the 5 main primitive types.Boolean()
,String()
andNumber()
to convert between primitive types.&&
,||
,!
and? :
.&&
and||
.+
,!
and>
.2. Control Flow
if
/else
statements.while
loops.for-of
Strings: You can predict and trace simple programs that iterate through the characters of a string usingfor-of
.for
loops works by refactoring simplefor
loops intowhile
loops.break
.continue
.3. Functions
5. Unit Testing
describe
/it
/expect.toEqual
functions are defined by a testing library and made available as global variables in a testing environment. They are not part of JavaScript!file.__.js
. Sub-extensions are a convention for developers and development tools. They do not change how JavaScript inside the file works.6. ES Modules
?deps
lens to visualize the dependencies in a folder.'use strict'
!export const _ = () => {};
import { _ } from './path/to/file.js';
6. Using Functions
7. Arrays
const arr = ['items'];
.at()
and a positive or negative index.arr[4] = 'hello'
.Array.isArray(something)
const shallowCopy = [...arr];
8. Functional Array Methods
[].every
[].some
[].map
[].filter
[].find
[].reduce
9. Multiple Interactions
const obj = { a: 1, b: 2 };
.