A lightweight package for working with small tables with low compilation cost. Provides the abstract type AbstractColumnTable and sub-types ColumnTable and MutableColumnTable For use as a drop-in replacement for NamedTuples of Vectors.

ColumnTable implements the API of NamedTuple and nothing more, except for Tables.jl definitions.

Unlike NamedTuples of Vectors, AbstractColumnTable do not store names or a tuple of element types in the type information. This allows 1000s of columns to be created with low compilation cost.

MutableColumnTable implements the same methods as ColumnTable, but in addition is mutable, meaning it implements the methods setfield! and setproperty!.

julia> using ColumnFrames

julia> t = ColumnFrame([:a, :b], [[1, 2], [4, 5]])
Immutable ColumnFrame with 2 columns and column type Vector{Int64}:
a:  [1, 2]
b:  [4, 5]


julia> t.a
2-element Vector{Int64}:
 1
 2

julia> s = MutableColumnFrame([:a, :b], [[1, 2], [3, 4]])
Mutable ColumnFrame with 2 columns and column type AbstractVector:
a:  [1, 2]
b:  [3, 4]


julia> s.c = [5, 6]
2-element Vector{Int64}:
 5
 6

julia> s
Mutable ColumnFrame with 3 columns and column type AbstractVector:
a:  [1, 2]
b:  [3, 4]
c:  [5, 6]