Sha256: 4bcac1505d0a62a6bec30ba3ce9d5a8cecc04f353798b3460fa20b8b60313a3f
Contents?: true
Size: 506 Bytes
Versions: 6
Compression:
Stored size: 506 Bytes
Contents
class Hash
# Take a subset of the hash, based on keys given or a block
# that evaluates to true for each hash key.
#
# {'a'=>1, 'b'=>2}.subset('a') #=> {'a'=>1}
# {'a'=>1, 'b'=>2}.subset{|k| k == 'a' } #=> {'a'=>1}
#
# CREDIT: Alexey Petrushin
def subset(keys=nil, &block)
h = {}
if keys
self.each do |k, v|
h[k] = v if keys.include?(k)
end
else
self.each do |k, v|
h[k] = v if block.call(k)
end
end
h
end
end
Version data entries
6 entries across 5 versions & 1 rubygems