Top Level Namespace

Instance Method Summary collapse

Instance Method Details

#pv(&block) ⇒ Object

Print variable with variable name & variable value.

Usage

var = 1
var2, var_foo, v = 2, 3, 4

pv{:var}               #=> var = 1
pv{i(var2 var_foo v)} #=> var2    = 2
                       #   var_foo = 3
                       #   v       = 4



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# File 'lib/pv.rb', line 17

def pv(&block)
  ret = block.call

  symbols = if ret.is_a?(Symbol)
    [ret]
  elsif ret.is_a?(Array) and ret.all?{|x| x.is_a?(Symbol)}
    ret
  else
    raise "Given block must return Symbol or Array only includes Symbol"
  end

  varname_length = symbols.map{|symbol| symbol.to_s.length}.max
  
  symbols.each do |symbol|
    puts "#{symbol.to_s.ljust(varname_length)} = #{block.binding.eval(symbol.to_s)}"
  end

  ret
end