Version 0.3.1

• Improve recode with missing values.
• Add fill! method.
• Fix eltype(::CategoricalString) to return Char.
• Fix Range deprecation on Julia 0.7.

Version 0.3.0

This release breaks compatibility with the 0.2.x series by moving from Nulls.jl to Missings.jl.

Other changes:

• Introduce CategoricalString <: AbstractString, used with CategoricalArray{String}. Other types of CategoricalArray continue to use CategoricalValue, which no longer inherits from AbstractString.
• Preserve ordering of levels with copy! and improve it in several cases.
• Make CategoricalArray constructor and levels! dramatically more efficient with many levels.

Version 0.2.3

• Override Nulls.levels instead of defining our own function. This prevents conflicts with e.g. DataArrays and allows packages to use it without directly depending on CategoricalArrays.
• Reexport Nulls for convenience.

Version 0.2.2

Compatibility with Nulls 0.1.0, which uses three-valued logic. == now returns null for nullable CategoricalArray when one of the compared arrays contains a null and no non-null pair of values differ. Use isequal to always get a boolean result (considering null as equal to null, and different from any non-null value).

Version 0.2.1

• Make CategoricalValue <: AbstractString and implement the full string interface transparently for CategoricalValue{<:AbstractString} objects.
• Improve the printing of type information for CategoricalArray.

Version 0.2.0

This release breaks compatibility with the 0.1.x series by moving from Nullable{T} to Union{Null, T} to represent missing values. NullableCategoricalArray{T} has been replaced with CategoricalArray{Union{Null, T}}. The package now requires Julia 0.6.

Version 0.1.6

• Fix convert(::Type{Any}, ::CategoricalValue) on Julia 0.7.
• Add __precompile__ declaration.

Version 0.1.5

• Fix specificity of convert methods (to fix a bug in Julia 0.6)

Version 0.1.4

• Add recode function to conveniently and efficiently replace one or multiple values
• Fix in methods

Version 0.1.3

• Only make copies when necessary from constructors (this may require more explicit copying where appropriate).
• Preserve levels, ordering an reference type when converting between CategoricalArray and NullableCategoricalArray.
• Throw an error when null values are found when converting from NullableCategoricalArray to CategoricalArray.
• Add Documenter.jl manual.