https://github.com/tpapp/multibroadcast.jl

Utilities for broadcasting functions with multiple values in Julia
https://github.com/tpapp/multibroadcast.jl

Last synced: 5 months ago
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Utilities for broadcasting functions with multiple values in Julia

• Host: GitHub
• URL: https://github.com/tpapp/multibroadcast.jl
• Owner: tpapp
• License: other
• Created: 2017-09-17T08:47:53.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2020-12-20T09:16:57.000Z (over 5 years ago)
• Last Synced: 2026-01-20T20:05:03.413Z (5 months ago)
• Language: Julia
• Size: 9.77 KB
• Stars: 2
• Watchers: 1
• Forks: 1
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

          
# MultiBroadcast

[![Project Status: WIP – Initial development is in progress, but there has not yet been a stable, usable release suitable for the public.](http://www.repostatus.org/badges/latest/wip.svg)](http://www.repostatus.org/#wip)

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[![codecov.io](http://codecov.io/github/tpapp/MultiBroadcast.jl/coverage.svg?branch=master)](http://codecov.io/github/tpapp/MultiBroadcast.jl?branch=master)

## Introduction

This is an **experimental** Julia package that explores broadcasting functions

with multiple values (cf

[#23734](https://github.com/JuliaLang/julia/issues/23734)). The only

exported function is `multi_broadcast`, which is best explained with

an example:

```julia

f(x) = x+1, 2*x

a, b = multi_broadcast(f, 1:10)

a == collect(2:11)

b == collect(2:2:20)

```

There is a convenience syntax for this with the `@multi` macro:

```julia

@multi f.(1:10)

```

The package also extends `broadcast!`, so if you preallocate for the output, you can do

```julia

x = 1:10

a = similar(BitArray, x)

b = similar(Array{Int}, x)

f(x) = isodd(x), 3*x

a, b .= f.(a, b) # note: no new syntax required

```

## Implementation

I am relying on the existing implementation of `broadcast` as much as

possible, saving values in a thin wrapper type that contains a tuple

of arrays. Whether this is a viable approach remains to be seen.

I wrote this up so that I can experiment with the interface, and

because I find the functionality useful. If you have suggestions for

improvement, please open an issue or make a PR.