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1
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struct EnumerableGroupBySimple{T,TKey,TS,SO,ES<:Function} <: Enumerable
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2
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47
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source::SO
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3
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elementSelector::ES
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4
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end
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5
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6
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struct Grouping{TKey,T} <: AbstractArray{T,1}
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7
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47
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_key::TKey
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8
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elements::Array{T,1}
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9
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end
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10
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11
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0
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key(g::Grouping) = getfield(g, :_key)
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12
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13
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struct GroupColumnArrayView{T,G,INDEX} <: AbstractVector{T}
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14
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grouping::G
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15
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end
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16
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17
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function Base.size(gcav::GroupColumnArrayView)
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18
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0
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return size(gcav.grouping)
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19
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end
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20
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21
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function Base.getindex(gcav::GroupColumnArrayView{T,G,INDEX}, i::Int) where {T,G,INDEX}
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22
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0
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return getproperty(gcav.grouping[i],INDEX)
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23
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end
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24
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25
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0
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Base.IndexStyle(::Type{GroupColumnArrayView}) = IndexLinear()
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26
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27
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function Base.getproperty(g::Grouping{TKey,T}, name::Symbol) where {TKey,T}
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28
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29
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0
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return GroupColumnArrayView{fieldtype(T,name),Grouping{TKey,T},name}(g)
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30
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end
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31
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32
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17
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Base.size(A::Grouping{TKey,T}) where {TKey,T} = size(getfield(A, :elements))
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33
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17
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Base.getindex(A::Grouping{TKey,T},i) where {TKey,T} = getfield(A, :elements)[i]
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34
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0
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Base.length(A::Grouping{TKey,T}) where {TKey,T} = length(getfield(A, :elements))
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35
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36
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0
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Base.eltype(::Type{EnumerableGroupBySimple{T,TKey,TS,SO,ES}}) where {T,TKey,TS,SO,ES} = T
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37
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38
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function groupby(source::Enumerable, f_elementSelector::Function, elementSelector::Expr)
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39
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47
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TS = eltype(source)
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40
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47
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TKey = Base._return_type(f_elementSelector, Tuple{TS,})
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41
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|
|
42
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SO = typeof(source)
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43
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|
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44
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47
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T = Grouping{TKey,TS}
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45
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46
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47
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ES = typeof(f_elementSelector)
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47
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|
|
48
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47
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return EnumerableGroupBySimple{T,TKey,TS,SO,ES}(source,f_elementSelector)
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|
49
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end
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|
50
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|
51
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function Base.iterate(iter::EnumerableGroupBySimple{T,TKey,TS,SO,ES}) where {T,TKey,TS,SO,ES}
|
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52
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47
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result = OrderedDict{TKey,T}()
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53
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47
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for i in iter.source
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54
|
39
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key = iter.elementSelector(i)
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|
55
|
47
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if !haskey(result, key)
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56
|
47
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result[key] = T(key,Array{TS}(undef, 0))
|
|
57
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|
end
|
|
58
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47
|
push!(getfield(result[key], :elements),i)
|
|
59
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|
end
|
|
60
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|
|
|
61
|
39
|
groups = collect(values(result))
|
|
62
|
47
|
if length(groups)==0
|
|
63
|
0
|
return nothing
|
|
64
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|
else
|
|
65
|
47
|
return groups[1], (groups, 2)
|
|
66
|
|
end
|
|
67
|
|
end
|
|
68
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|
|
|
69
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function Base.iterate(iter::EnumerableGroupBySimple{T,TKey,TS,SO,ES}, state) where {T,TKey,TS,SO,ES}
|
|
70
|
17
|
if state[2]>length(state[1])
|
|
71
|
17
|
return nothing
|
|
72
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|
else
|
|
73
|
17
|
return state[1][state[2]], (state[1], state[2]+1)
|
|
74
|
|
end
|
|
75
|
|
end
|
|
76
|
|
|
|
77
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struct EnumerableGroupBy{T,TKey,TR,SO,ES<:Function,RS<:Function} <: Enumerable
|
|
78
|
47
|
source::SO
|
|
79
|
|
elementSelector::ES
|
|
80
|
|
resultSelector::RS
|
|
81
|
|
end
|
|
82
|
|
|
|
83
|
0
|
Base.eltype(::Type{EnumerableGroupBy{T,TKey,TR,SO,ES, RS}}) where {T,TKey,TR,SO,ES,RS} = T
|
|
84
|
|
|
|
85
|
|
function groupby(source::Enumerable, f_elementSelector::Function, elementSelector::Expr, f_resultSelector::Function, resultSelector::Expr)
|
|
86
|
47
|
TS = eltype(source)
|
|
87
|
47
|
TKey = Base._return_type(f_elementSelector, Tuple{TS,})
|
|
88
|
|
|
|
89
|
|
SO = typeof(source)
|
|
90
|
|
|
|
91
|
47
|
TR = Base._return_type(f_resultSelector, Tuple{TS,})
|
|
92
|
|
|
|
93
|
47
|
T = Grouping{TKey,TR}
|
|
94
|
|
|
|
95
|
47
|
ES = typeof(f_elementSelector)
|
|
96
|
47
|
RS = typeof(f_resultSelector)
|
|
97
|
|
|
|
98
|
47
|
return EnumerableGroupBy{T,TKey,TR,SO,ES,RS}(source,f_elementSelector,f_resultSelector)
|
|
99
|
|
end
|
|
100
|
|
|
|
101
|
|
function Base.iterate(iter::EnumerableGroupBy{T,TKey,TR,SO,ES}) where {T,TKey,TR,SO,ES}
|
|
102
|
47
|
result = OrderedDict{TKey,T}()
|
|
103
|
47
|
for i in iter.source
|
|
104
|
39
|
key = iter.elementSelector(i)
|
|
105
|
47
|
if !haskey(result, key)
|
|
106
|
47
|
result[key] = T(key,Array{TR}(undef,0))
|
|
107
|
|
end
|
|
108
|
47
|
push!(getfield(result[key], :elements),iter.resultSelector(i))
|
|
109
|
|
end
|
|
110
|
|
|
|
111
|
39
|
groups = collect(values(result))
|
|
112
|
47
|
if length(groups)==0
|
|
113
|
0
|
return nothing
|
|
114
|
|
else
|
|
115
|
47
|
return groups[1], (groups, 2)
|
|
116
|
|
end
|
|
117
|
|
end
|
|
118
|
|
|
|
119
|
|
function Base.iterate(iter::EnumerableGroupBy{T,TKey,TR,SO,ES}, state) where {T,TKey,TR,SO,ES}
|
|
120
|
47
|
if state[2]>length(state[1])
|
|
121
|
47
|
return nothing
|
|
122
|
|
else
|
|
123
|
47
|
return state[1][state[2]], (state[1], state[2]+1)
|
|
124
|
|
end
|
|
125
|
|
end
|
davidanthoff