Julia: How to Understand the Dot Syntax

The following codes were tested under Julia v1.6.1 and DataFrames v1.2.0.

The Doc Syntax in Julia is in the form of FUN.(A) where A is an array. This syntax will apply the function to each element in the array you input.

For example:

julia> using DataFrames julia> a = 1:5
1:5 julia> b = ‘a’:‘e’
‘a’:1:‘e’ julia> df = DataFrame(“A” => a, “B” => b)
5×2 …