红宝石挤压双字符

Question

挤字符串中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

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

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

Answer 2

您可以使用基于正则表达式搜索和替换：

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