The Journey of #100DaysOfCode (@Tala_Hareb)

Tala_Hareb · 2024-07-12T16:34:59.378Z

Hey everyone!

I’m taking on the #100DayCodeChallenge!

Over the next 100 days, I’ll be sharing my journey, knowledge, and experiences.

Stay tuned for regular updates!

Tala_Hareb · 2024-07-15T10:29:53.297Z

Day 1:

Today I learned about “Promises” in JS.

Definitions :

Promises : A way to handle asynchronous operations. ( put simply: They represent a value that might be available now, in the future, or never. ) => formally noted as pending, fulfilled, or rejected.
Asynchronous operations : Allow a task to start, continue doing other things, and then finish later. They don’t block or stop the program from running other code in the meantime.

Initializing a Promise :

using const : const = constant. Use const when you know you won’t change the promise.
using let : let = let this variable change if needed. Use let when you think you might need to change the promise to something else.

Tala_Hareb · 2024-07-15T17:37:21.419Z

Day 2:

Arrow Functions:

When to use:

For quick, simple functions.
To ensure this is lexically scoped, especially in callbacks: Like a robot that remembers its owner even if told to do something later.
When you don’t need a function with its own arguments or this context: Like a robot doing a simple task without needing extra tools.

When not to use:

When creating a constructor function.
If this needs to be dynamic within the function: Like a robot that can change its owner based on who is using it.
If you need the arguments object: Like a robot that needs to know information outside the task to complete the assigned task.

Summary

Use arrow functions when you have simple tasks that don’t need special tools or changing owners.
Don’t use arrow functions when you need to see all the arguments or change the robot’s owner (this).

system · 2025-01-08T16:35:08.208Z

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