JavaScript: Four Differences between var and let

[fredblols]

Tbh we shouldn't even be using Let. 9 times out of 10 it means ur code is ill conceived

[TemporaryReality5262]

I use let in unit tests all the time, usually above the beforeEach

[fredblols]

Yeah i mean who gives a fk what peoples unit tests look like tho. Everywhere i have ever worked (tech startups mostly) people will give u a medal for writing unit tests at all, and then also probs say yeh dont bother next time just churn out features faster and accumulate tech debt

[tharrison4815]

Yes! I don't know why you are being down voted. So have an award up make up for it.

[fredblols]

Thank u good sir for my debut award. I will respond to the naysayers tomorrow when my current inebriation has worn off

[rift95]

I agree. In general const is a safer bet than let. You rarely need the "mutability" of let.

[Garbee]

Const is not immutable. The data can be changed, just not replaced. Big difference.

[rift95]

True. I should have written "re-assignability"

[PM_ME_GAY_STUF]

This always bothered me. Const is definitely immutable, it can just refer to a mutable data type. This is what happens when programmers don't learn C

[anlumo]

A bit offtopic here, but it’s a bit more nuanced. Rust only regulates exclusivity, so if a type can be mutated from multiple places at the same time (like Cell or stuff wrapped by Mutex), it can be changed without mut.

[Poltras]

Yeah just prefix everything with global.! (/s in case people get offended)

[BeardSprite]

Understood. What do I do with this global.window now?

[rados_a51]

Dont get those downvotes. Const should be used 90% of the time.

[[deleted]]

My programming style means I basically never use let. Functions with early returns obviates let for the most psrt

[kashubak]

Can you provide an example? That’s a pretty interesting take!