Contents i I Home 1 1 Julia 1.3-DEV Documenta�on 3 Introduc�on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 II Julia v1.3 Release Notes 5 2 New language . . . . . . . . . . . . . . 1254 Part I Home 1 Chapter 1 Julia 1.3-DEV Documenta�on Welcome to the documenta�on for Julia 1.3-DEV. Work in progress! This documenta�on is for an unreleased, in-development wri�en in Julia itself, including primi�ve opera�ons like integer arithme�c 3 4 CHAPTER 1. JULIA 1.3-DEV DOCUMENTATION • A rich language of types for construc�ng and describing objects, that can also

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1

2 1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Getting else. Once you understand how Julia works, it is easy to write code that is nearly as fast as C. 1.3 Julia Compared to Other Languages Julia features optional typing, multiple dispatch, and good performance A = [1.3, -2.7, 4.4, 3.1]; julia> @ccall qsort(A::Ptr{Cdouble}, length(A)::Csize_t, sizeof(eltype(A))::Csize_t, mycompare_c::Ptr{Cvoid})::Cvoid �→ julia> A 4-element Vector{Float64}: -2.7 1.3 3.1