Ruby –The Redo command

Ruby has a three loop controlling command : Break , Next and Redo ,while the Break and the Next command has equivalents in all other languages Redo is unique to Ruby .

Redo acts like next except it doesn't evaluate the while condition .

example:

  1: while line = gets

  2: puts line 

  3: break if line =~ /^STOP/ # stop at end

  4: redo if line.gsub!(/^STO/) { line = 'STOP'}

  5: end

The result :
ee
ee
sto
sto
STO
STO
STOP