我想知道是否有一种简单的方法可以用简单的方式在ruby中完成所选字符替换的每个组合.
一个例子：
string = "this is a test"
subs = ['a'=>'@','i'=>'!','s'=>'$']
subs.combination.each { |c|
string.gsub c
}
会屈服
"this is @ test"
"th!s !s a test"
"thi$i$a te$t"
"th!s !s @ test"
"thi$i$@ te$t"
"th!$!$a te$t"
"th!$!$@ te$t"
谢谢您的帮助！
解决方法
string = "this is a test"
subs = ['a'=>'@','s'=>'$']
subs = subs.first.map(&:to_a)
1.upto(subs.length).each do |n|
subs.combination(n).each do |a|
p a.each_with_object(string.dup){|pair,s| s.gsub!(*pair)}
end
end