class Pry::Command::WatchExpression::Expression
Attributes
Public Class Methods
Source
# File lib/pry/commands/watch_expression/expression.rb, line 9 def initialize(pry_instance, target, source) @pry_instance = pry_instance @target = target @source = Code.new(source).strip end
Public Instance Methods
Source
# File lib/pry/commands/watch_expression/expression.rb, line 29 def changed? (value != previous_value) end
Has the value of the expression changed?
We use the pretty-printed string representation to detect differences as this avoids problems with dup (causes too many differences) and == (causes too few)
Source
# File lib/pry/commands/watch_expression/expression.rb, line 15 def eval! @previous_value = value @value = Pry::ColorPrinter.pp(target_eval(target, source), ''.dup) end
Source
# File lib/pry/commands/watch_expression/expression.rb, line 20 def to_s "#{Code.new(source).highlighted.strip} => #{value}" end
Private Instance Methods
Source
# File lib/pry/commands/watch_expression/expression.rb, line 35 def target_eval(target, source) target.eval(source) rescue StandardError => e e end