基本上问题是什么.如何删除字符串中给定索引位置的字符? String类似乎没有任何方法可以执行此操作.
["ELLO","HLLO","HELO","HELL"]
我这样做
d = Array.new(c.length){|i| c.slice(0,i)+c.slice(i+1,c.length)}
解决方法
$cat m.rb class String def maulin! n slice! n self end def maulin n dup.maulin! n end end $irb >> require 'm' => true >> s = 'hello' => "hello" >> s.maulin(2) => "helo" >> s => "hello" >> s.maulin!(1) => "hllo" >> s => "hllo"