launchkit-codes

def a(val)
  val += 1
  lambda { return val }.call
  val += 1
end

val = a(1)

p val # => 3

launchkit-codes

class NotAnError
end

raise NotAnError

launchkit-codes

class PolicyError < Exception
end

class UserPolicyError < PolicyError
end

begin
  raise PolicyError, 'access not granted'
rescue PolicyError => policy_error
  puts "#{policy_error.class}: #{policy_error.message}"

launchkit-codes

i = 0

begin
  i += 1
  puts "retry ##{i}"

  raise RuntimeError
rescue RuntimeError => e
  retry if i < 3
end

launchkit-codes

begin
  "my string".odd?
rescue NoMethodError => e
  puts "#{$!.class}: #{$!.message}"
  $@.each { |loc| puts loc }
  
  # SAME AS
  # puts "#{e.class}: #{e.message}"
  # e.backtrace.each { |loc| puts loc }
end

launchkit-codes

begin
  3 / 0
rescue ZeroDivisionError => e
  puts "#{e.class}: #{e.message}"
end

begin
  "my string".odd?
rescue NoMethodError => e
  puts "#{e.class}: #{e.message}"

launchkit-codes

begin
  raise NoMethodError, 'an error occurred'
rescue NoMethodError => e
  puts "#{e.class}: #{e.message}"
end

launchkit-codes

while gets
  puts "line: #{$_}"
end

launchkit-codes

p $VERBOSE
warn 'printed'

def test
end

def test
end

launchkit-codes

p $VERBOSE
warn 'printed'
{ my_key: 'value', my_key: 'another_value' }