CODEWITHSUNDEEP
linqjulia
Unknown Coder
Unknown Coder

Reputation: 6731

Query a Julia dictionary for certain values

I am not new to programming but I am new to Julia. I have a Julia dictionary object that looks like the following:

Dict{Any,Any}(28.1=>1, 132.0=>2, 110.0=>3)

How can I write code to filter out the values that meet a certain criteria? Like let's say that I want all pairs where the value is >2 or >=2. I'm basically looking for the LINQ equivalent in Julia.

Upvotes: 9

Views: 2148

Answers (1)

Fengyang Wang
Fengyang Wang

Reputation: 12051

In Base, the standard way is to use map and filter:

julia> d = Dict{Any,Any}(28.1=>1, 132.0=>2, 110.0=>3);
julia> filter((k, v) -> v > 2, d)
Dict{Any,Any} with 1 entry:
  110.0 => 3

If you use DataFrames, there is a LINQ-like interface in DataFramesMeta.

Upvotes: 9

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