https://github.com/queryverse/datavalues.jl

Missing values for julia
https://github.com/queryverse/datavalues.jl

data julia queryverse

Last synced: 1 day ago
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Missing values for julia

• Host: GitHub
• URL: https://github.com/queryverse/datavalues.jl
• Owner: queryverse
• License: other
• Created: 2016-10-23T01:20:31.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2020-08-22T16:53:37.000Z (about 4 years ago)
• Last Synced: 2024-10-02T05:05:45.361Z (1 day ago)
• Topics: data, julia, queryverse
• Language: Julia
• Size: 682 KB
• Stars: 14
• Watchers: 4
• Forks: 7
• Open Issues: 35
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# DataValues

[![Project Status: Active - The project has reached a stable, usable state and is being actively developed.](http://www.repostatus.org/badges/latest/active.svg)](http://www.repostatus.org/#active)

[![Build Status](https://travis-ci.org/queryverse/DataValues.jl.svg?branch=master)](https://travis-ci.org/queryverse/DataValues.jl)

[![Build status](https://ci.appveyor.com/api/projects/status/nkd83orhu4xm68yp/branch/master?svg=true)](https://ci.appveyor.com/project/queryverse/datavalues-jl/branch/master)

[![codecov](https://codecov.io/gh/queryverse/DataValues.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/queryverse/DataValues.jl)

## Overview

This package provides the type ``DataValue`` that is used to represent missing data.

Currently the main use of this type is in the [Query.jl](https://github.com/queryverse/Query.jl) and [IterableTables.jl](https://github.com/queryverse/IterableTables.jl) packages.

This repo is based on the following principles/ideas:

- This type is meant to make life for data scientists as easy as possible.

That is the main guiding principle.

- We hook into the dot broadcasting mechanism from julia 0.7 to provide

lifting functionality for functions that don't have specific methods

for ``DataValue`` arguments.

- The ``&`` and ``|`` operators follow the [3VL](https://en.wikipedia.org/wiki/Three-valued_logic)

semantics for ``DataValue``s.

- Comparison operators like ``==``, ``<`` etc. on ``DataValue``s return

``Bool`` values, i.e. they are normal [predicates](https://en.wikipedia.org/wiki/Predicate_(mathematical_logic)).

- The package provides many lifted methods.

- One can access or unpack the value within a ``DataValue`` either via the

``get(x)`` function, or use the ``x[]`` syntax.

Any help with this package would be greatly appreciated!