Convert a vector of positive/negative elements to all positive elements in Julia?

Question

Given a one dimensional vector in Julia with positive and negative entries, like A=[1;-3;5;-7], is there any function or command that can alter this vector so that its elements all become positive, so that it becomes A=[1;3;5;7]?

Answer 1

Vectorize over abs:

julia> abs.(A)
4-element Vector{Int64}:
 1
 3
 5
 7

Any function in Julia can work over an array by just appending a dot . to its name.