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Contents
# frozen_string_literal: true
require 'active_support/core_ext/hash'
require 'active_support/core_ext/object/deep_dup'
unless Hash.method_defined? "only!"
class Hash
# Replaces the hash with only the given keys (if exists),
# but returns the same hash (not the removed keys - this differs to *Hash#slice!*)
#
# @example
# hsh = {a: 1, b: 2, c: 3}
# hsh.only!(:a, :d)
# > {a: 1}
# > hsh == {a: 1}
#
# @param [Array] keys
# @return [Hash] self
def only!(*keys)
slice!(*keys)
self
end
end
end
unless Hash.method_defined? "without!"
class Hash
# removes the given keys from hash and returns those key => value pairs
# (this differs to *Hash#except!*)
#
# @example
# hsh = {a: 1, b: 2, c: 3}
# hsh.without!(:a, :d)
# > {a: 1}
# > hsh == {b: 2, c: 3}
#
# @param [Array] keys
# @return [Hash] self
def without!(*keys)
Hash[to_a - except!(*keys).to_a]
end
end
end
unless Hash.method_defined? "deep_reject"
class Hash
# returns a new Hash with items that the block evaluates to true removed, also to deep Hashes.
def deep_reject(&blk)
deep_dup.deep_reject!(&blk)
end
# deep reject by provided block
# deep remove keys that the block evaluates to true
#
# @example
# hsh = {a: 1, b: 2, c: 3, d: {a: 1, b: 2, c: 3}}
# hsh.deep_reject! {|_k,v| v.is_a?(Numeric) && v > 2}
# > hsh == {a: 1, b: 2, d: {a: 1, b: 2}}
#
# hsh = {a: 1, b: 2, c: 3, d: {a: 1, b: 2, c: 3}}
# hsh.deep_reject! {|k,v| k == :d || v == 2}
# > hsh == {a: 1, c: 3}
def deep_reject!(&blk)
each do |k, v|
if blk.(k, v)
delete(k)
elsif v.is_a?(Hash)
v.deep_reject!(&blk)
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems