Sha256: a95d3275a4d82847bd67da04638abd31220a9d8d8065e41df9b366f9f8087e8f
Contents?: true
Size: 774 Bytes
Versions: 37
Compression:
Stored size: 774 Bytes
Contents
class Array
def sum
self.inject {|r, i| r + i }
end
def avg
self.sum / self.length
end
def group_by(name, &block)
item_h = {}
self.each do |item|
key = item[name.to_s]
item_h[key] ||= []
item_h[key] << item
end
return item_h unless block
new_item_h = {}
item_h.each do |key, item_list|
if block.arity == 2
new_item_h[key] = block.call(item_listm key)
else
new_item_h[key] = block.call(item_list)
end
end
return new_item_h
end
def method_missing(method_name, *args, &block)
case method_name.to_s
when /=\Z/
self.each {|i| i[method_name.to_s.sub(/=\Z/, '')] = *args }
self
else
self.map {|i| i[method_name.to_s] }
end
end
end
Version data entries
37 entries across 37 versions & 1 rubygems