ruby - 在 Ruby 中挤压双字符

Question

在字符串中压缩多字符的最佳方法是什么？

Example:
hahahahahaha => ha
lalalala => la
awdawdawdawd => awd

str.squeeze("ha")  # doesn't work
str.tr("haha", "ha") # doesn't work 

Answer 1

您可以使用基于正则表达式的搜索和替换：

str.gsub(/(ha)+/, 'ha')

Answer 2

def squeeze(s)
  s.gsub(/(.+?)\1+/, '\1')
end

puts squeeze('hahahaha')                  # => 'ha'
puts squeeze('awdawdawd')                 # => 'awd'
puts squeeze('hahahaha something else')   # => 'ha something else'