module Pry::Command::Ls::JRubyHacks
Private Instance Methods
rubbishness(name)
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When removing jruby aliases, we want to keep the alias that is “least rubbish” according to this metric.
# File lib/pry/commands/ls/jruby_hacks.rb, line 40 def rubbishness(name) name.each_char.map do |x| case x when /[A-Z]/ 1 when '?', '=', '!' -2 else 0 end end.inject(&:+) + (name.size / 100.0) end
trim_jruby_aliases(methods)
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JRuby creates lots of aliases for methods imported from java in an attempt to make life easier for ruby programmers. (e.g. getFooBar becomes get_foo_bar and foo_bar, and maybe foo_bar? if it returns a Boolean). The full transformations are in the assignAliases method of: github.com/jruby/jruby/blob/master/src/org/jruby/javasupport/JavaClass.java
This has the unfortunate side-effect of making the output of ls even more incredibly verbose than it normally would be for these objects; and so we filter out all but the nicest of these aliases here.
TODO: This is a little bit vague, better heuristics could be used.
JRuby also has a lot of scala-specific logic, which we don't copy.
# File lib/pry/commands/ls/jruby_hacks.rb, line 21 def trim_jruby_aliases(methods) grouped = methods.group_by do |m| m.name.sub(/\A(is|get|set)(?=[A-Z_])/, '').gsub(/[_?=]/, '').downcase end grouped.flat_map do |_key, values| values = values.sort_by do |m| rubbishness(m.name) end found = [] values.select do |x| (found.none? { |y| x == y }) && found << x end end end