JavaScript

Question

(O) => (O) <= (O)

what is this doing ???
compiles with no errors )

Answer 1

Nothing. => is an operator in JavaScript, but <= is not.

Answer 2

Sorry, I thought this was an emoji, but it's just ES6. In a more readable form it's something like

(function (O) {
return O <= (O)
})()

And closer to full-on crazy ES6

(O) => {
return O <= (O)
}

So, it's immediately executing and returning a Boolean value based on comparing O to itself (if this is the actual code), but not returning to anything so the value is just ignored.

Answer 3

but it’s compiling without any errors