delete for NamedTuples

base/exports.jl

@@ -482,6 +482,7 @@ export
     firstindex,
     collect,
     count,
+    delete,
     delete!,
     deleteat!,
     eltype,

base/namedtuple.jl

@@ -280,6 +280,24 @@ get(f::Callable, nt::NamedTuple, key::Union{Integer, Symbol}) = haskey(nt, key)
     (names...,)
 end
 
+"""
+    delete(a::NamedTuple, symbol(s))
+
+Construct a new named tuple from `a` by removing the named field[s].
+
+```jldoctest
+julia> delete((a=1, b=2, c=3), :b)
+(a = 1, c = 3)
+
+julia> delete((a=1, b=2, c=3), :a, :b)
+(c = 3)
+```
+"""
+function delete(a::NamedTuple{an}, fields::Symbol...) where {an}
+    names = diff_names(an, fields)
+    NamedTuple{names}(a)
+end
+
 """
     structdiff(a::NamedTuple{an}, b::Union{NamedTuple{bn},Type{NamedTuple{bn}}}) where {an,bn}
 

test/namedtuple.jl

@@ -201,6 +201,14 @@ end
 abstr_nt_22194_3()
 @test Base.return_types(abstr_nt_22194_3, ()) == Any[Any]
 
+@test delete((a=1, b=2), :b) == (a=1,)
+@test delete((a=1, b=2), :a) == (b=2,)
+@test delete((a=1, b=2), :z) == (a=1, b=2)
+@test delete((a=1, b=2, z=20), :b, :z) == (a=1,)
+@test delete((a=1, b=2, z=20), :a, :q, :r) == (b=2, z=20)
+@test delete((a=1, b=2, z=20), :a, :b, :z) == NamedTuple()
+@test delete((a=1, b=2)) == (a=1, b=2)
+
 @test Base.structdiff((a=1, b=2), (b=3,)) == (a=1,)
 @test Base.structdiff((a=1, b=2, z=20), (b=3,)) == (a=1, z=20)
 @test Base.structdiff((a=1, b=2, z=20), (b=3, q=20, z=1)) == (a=1,)