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(nt::NamedTuple, omitnames::Tuple{Vararg{Symbol}})
+
+Construct a copy of a named tuple `nt`, omitting the fields named in `omitnames`.
+"""
+function delete(a::NamedTuple{an}, omitnames::Tuple{Vararg{Symbol}}) where {an}
+    names = diff_names(an, omitnames)
+    NamedTuple{names}(a)
+end
+
+"""
+    delete(nt::NamedTuple, omitname::Symbol)
+
+Construct a copy of a named tuple `nt`, omitting the field named with `omitname`.
+"""
+delete(a::NamedTuple, omitname::Symbol) = delete(a, (omitname,))
+
+
 """
     structdiff(a::NamedTuple{an}, b::Union{NamedTuple{bn},Type{NamedTuple{bn}}}) where {an,bn}
 

test/namedtuple.jl

@@ -201,6 +201,15 @@ end
 abstr_nt_22194_3()
 @test Base.return_types(abstr_nt_22194_3, ()) == Any[Any]
 
+@test Base.delete((a=1, b=2), (:b,)) == (a=1,)
+@test Base.delete((a=1, b=2), (:a,)) == (b=2,)
+@test Base.delete((a=1, b=2, z=20), (:b,)) == (a=1, z=20)
+@test Base.delete((a=1, b=2, z=20), (:b, :q, :z)) == (a=1,)
+@test Base.delete((a=1, b=2, z=20), (:b, :q, :z, :a)) == NamedTuple()
+@test Base.delete((a=1, b=2), :b) == (a=1,)
+@test Base.delete((a=1, b=2), :a) == (b=2,)
+@test Base.delete((a=1, b=2), :z) == (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,)