如何从字符串中删除数组项？

Question

我有这个字符串：This is my example #foo and #bar

这个数组：['#foo','#bar']

这是我想要的字符串：This is my example and

THX！

Answer 1

定义你的字符串和数组：

s = "This is my example #foo and #bar"
a = ['#foo', '#bar']

然后：

answer_array = (s.split(" ") - a).join(" ")

给出答案：

=> "This is my example and"

Answer 2

以下保留空白：

str = 'This    is my example   #foo and #bar'
arr = ['#foo','#bar']

r = Regexp.new arr.each_with_object('') { |s,str| str << s << '|' }[0..-2]
  #=> /#foo|#bar/
str.gsub(r,'')
  #=> "This    is my example and "

另一个例子（列标签）：

str = "    Name        Age        Ht        Wt"
arr = ['        Age', '        Wt']

r = Regexp.new arr.each_with_object('') { |s,str| str << s << '|' }[0..-2]
  #=> /        Age|        Wt/
str.gsub(r,'')
  #=> "    Name        Ht"