Ruby Ref Manual keywords

&:=26

*:=2a

+:=2b

-:=2d

/:=2f

%:=25

^:=5e

~:=7e

+@:=2b=40

<<:=3c=3c

<=>:=3c=3d=3e

==:=3d=3d

[]:=5d=5d

collect!, map!:collect=21

empty?:empty=3f