How to initialize a dictionary in Julia?

Question

When I tried to do:

d = {1:2, 3:10, 6:300, 2:1, 4:5}

I get the error:

syntax: { } vector syntax is discontinued

How to initialize a dictionary in Julia?

Answer 1

The {} syntax has been deprecated in julia for a while now. The way to construct a dict now is:

Given a single iterable argument, constructs a Dict whose key-value pairs are taken from 2-tuples (key,value) generated by the argument.

julia> Dict([("A", 1), ("B", 2)])
  Dict{String,Int64} with 2 entries:
    "B" => 2
    "A" => 1

Alternatively, a sequence of pair arguments may be passed.

julia> Dict("A"=>1, "B"=>2)
  Dict{String,Int64} with 2 entries:
    "B" => 2
    "A" => 1

(as quoted from the documentation, which can be obtained by pressing ? in the terminal to access the "help" mode, and then type Dict)