Burdette LamarI have no idea how many times I've typed code like this (to do printf-style debugging):
my_hash.each_pair do |key, value|
p [key, value]
end
I've finally wised up, and built a helper method to support this:
DebugHelper.printf(data)
The method allows any data, and specifically supports Hash-like and Array-like structures.
It also allows an optional name (defaults to data class-name) and message.
Typical outputs:
Hash (size=3)
a => 0
b => 1
c => 2
Array (size=3)
0: a
1: b
2: c
And here's my helper class:
# Class to help in 'printf' debugging.
class DebugHelper
def self.printf(data, name = data.class.to_s, description = '')
size = data.respond_to?(:size) ? data.size : 1
puts format('%s (size=%d) %s', name, size, description)
case
when data.respond_to?(:each_pair)
# Hash-like.
data.each_pair do |k, v|
puts format(' %s => %s', k, v)
end
when data.respond_to?(:each_with_index)
# Array-like or Set-like.
data.each_with_index do |v, i|
puts format(' %6d: %s', i, v)
end
else
puts format(' %s', data.inspect)
end
nil
end
end
