在下面的代码中,k2
与k1
. 也就是说,k2
除了它是使用插值定义的之外,它完全相同。(也就是说,我预计它会完全一样;显然从结果来看p k2
不是。)
v = /[aeiouAEIOUäöüÄÖÜ]/ # vowels
k1 = /[[ßb-zB-Z]&&[^[aeiouAEIOUäöüÄÖÜ]]]/ # consonants defined without interpolation
k2 = /[[ßb-zB-Z]&&[^#{v}]]/ # consonants defined same way, but with interpolation
但如下所示,使用gsub
withk1
有效,而使用 withk2
以我不理解的方式失败。
all_chars = "äöüÄÖÜß"<<('a'..'z').to_a.join<<('A'..'Z').to_a.join
p all_chars # "äöüÄÖÜßabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
p all_chars.gsub( k1 , '_' ) # "äöüÄÖÜ_a___e___i_____o_____u_____A___E___I_____O_____U_____"
p all_chars.gsub( k2 , '_' ) # "äöüÄÖÜ_abcdefghijklm_o_____u__x__ABCDEFGHIJKLMNOPQRSTUVWXYZ"
p k1 # /[[ßb-zB-Z]&&[^[aeiouAEIOUäöüÄÖÜ]]]/
p k2 # /[[ßb-zB-Z]&&[^(?-mix:[aeiouAEIOUäöüÄÖÜ])]]/
为什么它不起作用?是什么(?-mix:...)
?有没有办法按照我期望的方式完成这项工作?