baweaver

# Ideal syntax for pattern matched methods:
def handle_response(body)
in 200, response
  # Ok response
in 500, error
  # Handle failure
else
  # No idea?
end

baweaver

def method_name(*args)
in 1, 2, 'foo', *
  # ...
in *, 'bar', *
  # ...
in String, String, *
  # ...
else
  'default'
end

baweaver

const ROOT   = document.getElementById("root");
const PREFIX = '::';
const GRAY   = '#CCC';
const KATEX_OPTIONS = {
  throwOnError: false
};

function slicePrefix(str) {
  return str.slice(PREFIX.length);
}

baweaver

module DashingRefinement
  refine Integer do
    def -(b) "#{self}-#{b}" end
  end

  refine String do
    def -(b) Date.parse("#{self}-#{b}") end
  end
end

baweaver

# 1 + 1
AstBuilder.build('1 + 1').to_ast.source
=> "1 + 1"

# From s-expressions
ast = AstBuilder.build { s(:send, s(:int, 1), :+, s(:int, 1)) }.to_ast
=> s(:send, s(:int, 1), :+, s(:int, 1))

# Current
ast.source

baweaver

# Original Code
hash = { something: 'fun' }
method_called(with, some, hash)

# AST
(begin
  (lvasgn :hash
    (hash
      (pair
        (sym :something)

baweaver

(def :route
  (args
    (arg :verb)
    (arg :path)
    (optarg :options
      (hash))
    (blockarg :block))
  (begin
    (...)
    (lvasgn :signature

baweaver

# Bad - Hard to read
some.really.long.chain_of_things(:with,
                                 :arguments,
                                 :that,
                                 :are,
                                 :out_here,
                                 :is_unreadable,
                                 :at_a_glance)

# Good - Eye doesn't flow far right then

baweaver

names = %w(
  @OtherChrisPine @DaveAronson @mellowfish @ktcarrel18 @yvonesre @molbrwn @_MylesHigh_ @DoodlingDev @nilsding @mae701
)

totally_random_results = "Lemur fun!"
  .chars
  .map(&:ord)
  .zip(names.shuffle.map(&:ord))
  .sample
  .sum

baweaver

Cons = Struct.new(:head, :tail)

case Cons[1, Cons[2]]
in Cons[head. tail] then [head, tail]
end
# => [1, #<struct Cons head=2, tail=nil>]
  
case Cons[1, Cons[2]]
in Cons[1, Cons[head, tail]] then [head, tail]
end