In python you can write
if (n := len(a)) > 10:
print(f"List is too long ({n} elements, expected <= 10)")
is there an equivalent feature in Julia?
The value of assignment is always passed through (because everything is an expression) in julia, so you could write
if (n = length(a)) > 1
println("List is too long ($(n) lements, expected <= 10)")
end
to avoid confusion with ==
and to make the variable local, you can use the local
keyword. This is then equivalent to a walrus operator
if (local n = length(a)) > 1
println("List is too long ($(n) lements, expected <= 10)")
end