Ruby shares a neat feature with Perl. Statement modifiers let you tack
conditional statements onto the end of a normal statement.
mon, day, year = $1, $2, $3 if /(\d\d)-(\d\d)-(\d\d)/
puts "a = #{a}" if fDebug
print total unless total == 0
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For an
if modifier, the preceding expression will be evaluated only
if the condition is true.
unless works the other way around.
while gets
next if /^#/ # Skip comments
parseLine unless /^$/ # Don't parse empty lines
end
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Because
if itself is an expression, you can get really obscure
with statements such as:
if artist == "John Coltrane"
artist = "'Trane"
end unless nicknames == "no"
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This path leads to the gates of madness.
