Ruby Super Keyword Arguments

Def puts super end puts 1 2 3 this method defined outside of any class will belong to object.

Ruby super keyword arguments.

Examples of this are the keyword arguments for float round kernel clone string lines introduced in ruby 2 4. 0 a b end. Within the child say method we call super without any argument. One strategy i ve been observing on ruby built in methods is that new versions tend to add new optional arguments as keyword arguments.

So ruby tries to find a method say in the ancestor chain of the child class. Rdoc style documentation forruby keywords 1 9 1. Super calls vehicular move forward end end called with no arguments andno empty argument list supercalls the appropriate method with the same arguments andthe same. We will take the examples mentioned there and for each scenario we will look into how we can fix them in the existing codebase.

Again to achieve similar behavior in ruby 1 9 the block would take an options hash from which we would extract argument values. We can add parentheses to the super keyword. The ruby super keyword behaves differently when used with or without arguments. Luckily ruby 2 1 introduced required keyword arguments which are defined with a trailing colon.

It will pass along the arguments used for the original method call to the new one including keyword arguments a block if given. Required keyword arguments unfortunately ruby 2 0 doesn t have built in support for required keyword arguments.