dictionary - 如何在 Julia 中初始化字典？

Question

当我尝试这样做时:

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

我收到错误:

syntax: { } vector syntax is discontinued

如何在 Julia 中初始化字典？

Answer 1

{}语法已经在 julia 中被弃用了一段时间。现在构造 dict 的方法是:

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

(引用自文档，可以通过在终端中按 ? 进入“帮助”模式，然后输入 Dict 获得)