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@eric
Created December 21, 2011 22:54
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module ObjectDiagnostics
extend self
def display(method, options = {})
res = format(method, options)
res.each { |l| puts l }
end
def format(method, options = {})
res = calculate(method, options)
case method
when :array_by_content
res.map! { |k, count| "#{count}: #{k.inspect[0..50]}"}
when :string_by_content
res.map! { |k, count| "#{count}: #{k[0..50].inspect}"}
else
res.map! { |k, count| "#{count}: #{k}" }
end
res
end
def calculate(method, options = {})
h = Hash.new { |h,k| h[k] = 0 }
mod = Object
p = case method
when :class_by_count
proc { |obj| h[obj.class.to_s] += 1 rescue nil }
when :array_by_length
mod = Array
proc { |obj| h[obj.length] += 1 }
when :array_by_content
mod = Array
proc { |obj| h[obj] += 1 rescue nil }
when :string_by_length
mod = String
proc { |obj| h[obj.length] += 1 }
when :string_by_content
mod = String
proc { |obj| h[obj] += 1 }
else
raise "Unknown method: #{method}"
end
ObjectSpace.each_object(mod, &p)
res = h.sort_by { |(k, v)| v }
if top = options[:top]
res = res[-top ... -1]
end
res
end
end
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