ruby - 如何替换 ruby​​ 中模式的每个实例？

Question

string.sub 看起来它只替换了第一个实例。是否有可以替代所有模式的选项或其他方法？你能在 perl 之类的正则表达式中完成吗？

(我觉得像 r/blah/blah/)

... 并 +1 给任何能告诉我为什么 string.sub 只替换第一个匹配项的人？

Answer 1

String.gsub应该可以解决问题。

引用文档:

gsub(pattern, replacement) → new_str

Returns a copy of str with the all occurrences of pattern substituted for the second argument. The pattern is typically a Regexp; if given as a String, any regular expression metacharacters it contains will be interpreted literally, e.g. \\d will match a backlash followed by d, instead of a digit.