I find myself often writing code like this when dealing pop! with a Dict{A,
B}
if !haskey(my_dict, key)
do_something...
end
value = pop!(my_dict, key)
do_something_else...
The code above has an issue: it looks up the key in a dict twice
unnecessary.
I know I can opt for the alternative pattern:
v = pop!(my_dict, key, nothing)
if v == nothing
do_something...
end
value::B = v
do_something_else...
Note this piece of code is also a bit annoying, as v is no longer type
stable. I have to think of another name "value" and apply an assignment
with type assert. (naming variables is hard)
Probably I can extend `pop!` with pop!(f, key, v) so that I can do:
value = pop!(my_dict, key) do
do_something...
end
do_something_else...
But using an anonymous function here seems an overkill with overhead?
What do people do in such case?
