Testing Array Ergonomics:
at(-1): 5
findLast(x=>x%2==0): 4
toReversed(): 5,4,3,2,1
toSorted((a,b)=>b-a): 5,4,3,2,1
with(0, 10): 10,2,3,4,5
toSpliced(1,2): 1,4,5
flat(2): 1,2,3
flatMap(x=>[x,x]): 1,1,2,2,3,3,4,4,5,5

Testing Object Ergonomics:
hasOwn(a): true
hasOwn(b): false
fromEntries.foo: bar
fromEntries.baz: 42

Testing Uint8Array Ergonomics:
fromHex: 222, 173, 190, 239
toHex: deadbeef
fromBase64: deadbeef
toBase64: 3q2+7w==