@lily @h const in js is a lie, it only means you can't...

@lily @h const in js is a lie, it only means you can't reassign to the variable
an array is just an object, so you can mutate any property in it (or even add more, which is honestly more cursed)

Like 4 August at 0:52 | Wall-to-wall | Open on wetdry.world

4 comments

rini ☁️

@lily @h node even displays that properly oml

an array with two items having an `x` property set to 0
when displayed, the property shows up inside the array as if it was in object notation, even though that's invalid syntax

4 August at 0:55 | Open on wetdry.world

hazel

@rini @lily yep, its just showing all key value pairs of the array and hiding the numbered keys. and those keys are actually strings btw not numbers, kinda

demonstration that changing the 0th item of an array not with the number 0 as the key but with the *string* "0" works

4 August at 0:59 | Open on social.besties.house

rini ☁️

@h @lily yeah the indices are all treated as strings (but optimised internally). by the spec arrays are "exotic objects", which means their impl can do weird things (length being set automatically when indices are added)

also fun fact most array methods dont actually require an array, so you can do [].join.call({ 0: "a", 1: "b", length : 2 }, ", ")

4 August at 1:20 | Open on wetdry.world

IAG

@rini @lily @h Java's final qualifier is the same

4 August at 1:07 | Open on wetdry.world

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