Understanding Immutability in JavaScript

[@jawwadalam]

Detailed simple explanation of why immutability is important. Thank you 👍

[@deborah_kurata]

So nice of you to say. Thank you for watching!

[@ashutoshtiwari5222]

Simple yet informative.

[@deborah_kurata]

Glad it was useful!

[@AesSedai2020]

Nice, this was a really good explanation why immutability is important, thank you :)

[@deborah_kurata]

Thank you! Glad it was helpful!

[@RsPippen]

perfect timing! i was just dealing with a bug related to this topic

[@deborah_kurata]

Great! Glad to hear it was useful!

[@codingSparrow143]

Thank you so much!! Very clear explanation❤❤

[@deborah_kurata]

Thank you. Glad it was helpful!

[@Sinan997]

Great video again, now i know why immutability is important. Thank you!

[@deborah_kurata]

Glad it was helpful! Thanks!

[@abdulrenishr]

Awesome explanation

[@deborah_kurata]

Thank you!

[@karlee8608]

The video is very informative. You should include a visual evidence of the primitive data type being immutable. Same thing with object and array. I like how you make the connection to the memory instead of the value itself. It helps explain what is going on behind the hood in JavaScript. If you can show an updated video with actual example that would be grateful.

[@deborah_kurata]

Thank you! In the description of the video, I have a link to some code that demonstrates immutability. It defines a variable of each data type (primitive, array, object) as a property of another object. It then demonstrates when the setter is called (code sees the value as changed) and when it isn't. Please see the video description for the link.

[@elyoaprogrammer]

So important topic explained by @DeborahKurata!!!

[@deborah_kurata]

Thank you!

[@ngotienthien7939]

thank a lot, That's so useful

[@deborah_kurata]

Thank you!

[@ibmmsayskhiedr4220]

Thanks a million I think immutability now became a piece of cake Thanks @Deborah

[@deborah_kurata]

Great! Thank you!

[@farzadbahadorifar1126]

you explain really well, thank for that.

[@deborah_kurata]

Thanks for watching!

[@FuyadFuyad-ns6qg]

very informative and well descriptive tutorial video. Hope you will give us more and more informative and well descriptive tutorials .❤

[@deborah_kurata]

Thank you! 😊

[@MANAHILEJAZ-s7z]

Thanks for your help, there's is a same concept of mutability and immutability in python also

[@deborah_kurata]

Yep! Immutability is a powerful concept across many languages! 😊

[@respostasimples]

doing god's work Kurata, thanks!

[@deborah_kurata]

😊 Thank you for watching!

[@GreenClearScenery]

Hi Deborah, in the video you give an example of primitives being immutable. So the code total = 42; // (1) total += 10; // (2) means that in (1), total is pointing at a memory with value 42. Then, in (2), total is pointing at a different memory address with value 52. But how can we re-access the value 42 ?? (We don't know the memory address for this anymore ?)

[@rs4267]

As usual great job ❤

[@deborah_kurata]

Thank you so much!

[@JJOhns-fy4tl]

so glad i found your channel. thank you for your clear explanations. one question though: when creating a new object by using the spread operator and the original object contains an array, i would copy the reference of the array, wouldn't I? So maybe I should figure out a combination of using the spread operator to treat the object as immutable and the with() method for the array. Or am i on the total wrong track?

[@NawalFatima-e8m]

slice performs a shallow copy of the array and it can be modified in future, so i think it should come under the mutable column

[@hodasalah1663]

you are the best Thanks a lot

[@deborah_kurata]

Thank you for watching!

[@povdata]

How to get value of p variable by prev address x?

[@SolidWorksMastery-hr4sg]

one question : i've read that dynamic arrays (which we use in javascript) create a new array in memory in case of adding new value which would exceed the length of the array , so does that mean that sometimes the address of the array change ?

[@deborah_kurata]

This answer may be useful: stackoverflow.com/a/20323491

[@MarcoPinheiro]

Bravo!!

[@deborah_kurata]

Thank you!

[@abnow1998]

Hi Deborah, been following you since 2020, have watched all of your Angular courses on Plural sight, my request and I believe this is currently the hot topic: Next.js, pls make a series on this..

[@deborah_kurata]

Thank you for the suggestion!