January 2020
Intermediate to advanced
532 pages
13h 31m
English
Content preview from Hands-On Design Patterns and Best Practices with Julia
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Example 1 – the OffsetArrays.jl package
The OffsetArrays.jl package allows us to define arrays with arbitrary indices rather than the standard linear or cartesian style indices. A fun example is to use a zero-based array, just like the ones you may find in other programming languages:
To understand how this works, we need to dig into the source code. Let's keep things concise and review just a portion of the code:
struct OffsetArray{T,N,AA<:AbstractArray} <: AbstractArray{T,N} parent::AA offsets::NTuple{N,Int}endBase.parent(A::OffsetArray) = A.parentBase.size(A::OffsetArray) = size(parent(A))Base.size(A::OffsetArray, d) = size(parent(A), d) ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.