Ruby {已解决}这个 chop! 有什么作用？
在这里看到的一段代码http://guides.ruby.tw/ruby/strings.html,guess.chop!有什么在这里是什么意思。没理解
# 把程式儲存為 guess.rb
words = ['foobar', 'baz', 'quux']
secret = words[rand(3)]
print "guess?"
while guess = STDIN.gets
#这个chop!是什么意思
guess.chop!
if guess == secret
puts "You win!"
break
else
puts "Sorry, you lose."
end
print "guess?"
end
puts "The word was " + secret + "."
http://www.ruby-doc.org/core-1.9.3/String.html#method-i-chop
Returns a new String with the last character removed. If the string ends with \r\n, both characters are removed. Applying chop to an empty string returns an empty string. String#chomp is often a safer alternative, as it leaves the string unchanged if it doesn’t end in a record separator.
#1 楼 @kenshin54 恩，知道这个定义，本来觉得应该没有什么需要 chop 的，再调试了下，它的意思是chop 掉最后的那个换行符。 thanks!