How to rewrite this function in one line?

Question

I have the following lines of code:

f((k,v)) = Symbol(k) => Symbol(v)
Dict(Iterators.map(f, pairs(names)))

And I want to write it in a single line. I tried this:

Dict(Iterators.map((k,v) -> Symbol(k) => Symbol(v), pairs(names)))

But it throws Method Error:

MethodError: no method matching (::var"#13#14")(::Pair{Symbol, String})

Is it possible to write this in a single line?

score 4 · Answer 1 · answered May 10 '22 at 11:02

4

What about

Dict(Symbol(k)=>Symbol(v) for (k, v) in pairs(names))

?

answered May 10 '22 at 11:02

DNF

This would be better, but I understood that OP had a problem with correct writing of method signatures. – Bogumił Kamiński May 10 '22 at 11:03
This looks cleaner. Thanks, both of you! @BogumiłKamiński – Jafar Isbarov May 10 '22 at 11:06

score 3 · Accepted Answer · answered May 10 '22 at 10:54

3

You want this:

Dict(Iterators.map(((k,v),) -> Symbol(k) => Symbol(v), pairs(names)))

(note the comma after (k,v) which forces destruction of the first argument to the anonymous function into two eleements)

answered May 10 '22 at 10:54

2 Answers2