example composes three functions and maps the result over an array of strings: julia> map(first ∘ reverse ∘ uppercase, split("you can compose functions like this")) 6-element Vector{Char}: 'U': ASCII/Unicode dot vectorization syntax (described below). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Vector{Any}: "A" "tsil" "Of" 7 When combining pipes with anonymous collection in reverse order by iterating over Iterators.reverse(iterator). To actually support reverse-order iteration, however, an iterator type T needs to implement iterate for Iterators.Reverse{T}. (Given

func�ons and maps the result over an array of strings: 92 CHAPTER 15. FUNCTIONS julia> map(first reverse uppercase, split("you can compose functions like this")) 6-element Array{Char,1}: 'U' 'N' 'E' 'S' dot vectoriza�on syntax (described next). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Array{Any,1}: "A" "tsil" "Of" 7 15.16 Dot Syntax for Vectorizing collec�on in reverse order byitera�ng over Iterators.reverse(iterator). To actuallysupport reverse-orderitera�on, however, an iteratortype T needs to implement iterate for Iterators.Reverse{T}. (Given r::Iterators

func�ons and maps the result over an array of strings: 94 CHAPTER 16. FUNCTIONS julia> map(first reverse uppercase, split("you can compose functions like this")) 6-element Array{Char,1}: 'U' 'N' 'E' 'S' dot vectoriza�on syntax (described next). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Array{Any,1}: "A" "tsil" "Of" 7 16.16 Dot Syntax for Vectorizing collec�on in reverse order byitera�ng over Iterators.reverse(iterator). To actuallysupport reverse-orderitera�on, however, an iteratortype T needs to implement iterate for Iterators.Reverse{T}. (Given r::Iterators

collec�on in reverse order byitera�ng over Iterators.reverse(iterator). To actuallysupport reverse-orderitera�on, however, an iteratortype T needs to implement iterate for Iterators.Reverse{T}. (Given r::Iterators r::Iterators.Reverse{T}, the underling iterator of type T is r.itr.) In our Squares example, we would implement Iterators.Reverse{Squares} methods: julia> Base.iterate(rS::Iterators.Reverse{Squares}, state=rS state=rS.itr.count) = state < 1 ? nothing : (state*state, state-1) �→ julia> collect(Iterators.reverse(Squares(4))) 4-element Array{Int64,1}: 16 9 4 1 22.2 Indexing For the Squares iterable above

collec�on in reverse order byitera�ng over Iterators.reverse(iterator). To actuallysupport reverse-orderitera�on, however, an iteratortype T needs to implement iterate for Iterators.Reverse{T}. (Given r::Iterators r::Iterators.Reverse{T}, the underling iterator of type T is r.itr.) In our Squares example, we would implement Iterators.Reverse{Squares} methods: julia> Base.iterate(rS::Iterators.Reverse{Squares}, state=rS state=rS.itr.count) = state < 1 ? nothing : (state*state, state-1) �→ julia> collect(Iterators.reverse(Squares(4))) 4-element Array{Int64,1}: 16 9 4 1 22.2 Indexing For the Squares iterable above

example composes three functions and maps the result over an array of strings: julia> map(first ∘ reverse ∘ uppercase, split("you can compose functions like this")) 6-element Vector{Char}: 'U': ASCII/Unicode dot vectorization syntax (described below). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Vector{Any}: "A" "tsil" "Of" 7 When combining pipes with anonymous collection in reverse order by iterating over Iterators.reverse(iterator). To actually support reverse-order iteration, however, an iterator type T needs to implement iterate for Iterators.Reverse{T}. (Given

example composes three functions and maps the result over an array of strings: julia> map(first ∘ reverse ∘ uppercase, split("you can compose functions like this")) 6-element Vector{Char}: 'U': ASCII/Unicode dot vectorization syntax (described below). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Vector{Any}: "A" "tsil" "Of" 7 When combining pipes with anonymous collection in reverse order by iterating over Iterators.reverse(iterator). To actually support reverse-order iteration, however, an iterator type T needs to implement iterate for Iterators.Reverse{T}. (Given

example composes three functions and maps the result over an array of strings: julia> map(first ∘ reverse ∘ uppercase, split("you can compose functions like this")) 6-element Vector{Char}: 'U': ASCII/Unicode dot vectorization syntax (described below). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Vector{Any}: "A" "tsil" "Of" 7 When combining pipes with anonymous collection in reverse order by iterating over Iterators.reverse(iterator). To actually support reverse-order iteration, however, an iterator type T needs to implement iterate for Iterators.Reverse{T}. (Given

example composes three functions and maps the result over an array of strings: julia> map(first ∘ reverse ∘ uppercase, split("you can compose functions like this")) 6-element Vector{Char}: 'U': ASCII/Unicode dot vectorization syntax (described below). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Vector{Any}: "A" "tsil" "Of" 7 When combining pipes with anonymous collection in reverse order by iterating over Iterators.reverse(iterator). To actually support reverse-order iteration, however, an iterator type T needs to implement iterate for Iterators.Reverse{T}. (Given

example composes three functions and maps the result over an array of strings: julia> map(first ∘ reverse ∘ uppercase, split("you can compose functions like this")) 6-element Vector{Char}: 'U': ASCII/Unicode dot vectorization syntax (described below). julia> ["a", "list", "of", "strings"] .|> [uppercase, reverse, titlecase, length] 4-element Vector{Any}: "A" "tsil" "Of" 7 When combining pipes with anonymous collection in reverse order by iterating over Iterators.reverse(iterator). To actually support reverse-order iteration, however, an iterator type T needs to implement iterate for Iterators.Reverse{T}. (Given