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