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MoreMaps.jl ​

A flexible mapping framework for Julia that provides different parallel backends, progress tracking, and iteration patterns.

Features ​

  • Multiple backends: Sequential, Threads, Distributed, and Dagger execution

  • Progress tracking: Support for various progress-logging backends

  • Nested array support: Map over specific leaf types in nested array structures

  • Cartesian expansions: Easy cartesian product iterations

Quick Start ​

julia
using MoreMaps

# Basic usage with default sequential backend
x = rand(100)
C = Chart()
y = map(sqrt, C, x)

# Use threading for parallel execution
C_threaded = Chart(Threaded())
y_threaded = map(sqrt, C_threaded, x)

# Add progress tracking
C_progress = Chart(Threaded(), LogLogger(10))
y_progress = map(sqrt, C_progress, x)
100-element Vector{Float64}:
 0.6335697448105473
 0.5231538314906322
 0.3183857303769386
 0.6213351065770732
 0.6868870713547407
 0.35322354182720406
 0.392318669516467
 0.8462473733284664
 0.2488385615983557
 0.5175901260419997
 ⋮
 0.5110883860429979
 0.5507122658149486
 0.7537018501265244
 0.96943783813879
 0.6236373260952588
 0.9612657557665225
 0.22491518330970867
 0.36416175051516647
 0.6977032011755038

Basics ​

The basis of a MoreMaps map is the Chart type, which configures how mapping operations are executed.

A Chart has the following fields:

  • backend: Specifies the execution backend

  • progress: Configures the progress logging behavior

  • leaf: Defines the element type where recursion terminates, for mapping nested arrays

  • expansion: Determines the expansion strategy (e.g. Cartesian product)

A chart can be constructed using keywords or arbitrary-order positional arguments. The default Chart() reproduces Base.map(), and is constructed as:

julia
C = Chart(backend=Sequential(),    # No parallel execution; similar to Base.map
          progress=NoProgress(),   # No progress logging
          leaf=MoreMaps.All,                # Map over each element of the root array, like Base.map
          expansion=NoExpansion()) # Map over the original input arrays, as for Base.map

# Or
C = Chart(Sequential(), NoProgress(), MoreMaps.All, NoExpansion()) # In any order

# Default behavior
C == Chart()

Mapping ​

Once you have a Chart, pass it to the standard Base.map function:

julia
using MoreMaps

x = rand(10)
C = Chart()
y = map(sqrt, C, x)
y == map(sqrt, x)
true

See the following pages for details on configuring a Chart:

  • Backends - Execution strategies (Sequential, Threaded, Distributed, Dagger)

  • Progress - Progress tracking options

  • Leaves - Nested array handling

  • Expansions - Cartesian product iterations