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新手问题 怎么判断 params 传递进来的值为空格

wxliuzifan · February 02, 2015 · Last by jasl replied at February 02, 2015 · 1797 hits

如题。。。求大神

blacktulip #1 February 02, 2015

== " " 不行？

flowerwrong #2 February 02, 2015

' '.blank? # true

blacktulip #3 February 02, 2015

#2 楼 @flowerwrong blank? 不光能匹配空格的，沒東西也能匹配

blacktulip #4 February 02, 2015

如果樓主指的是不定數目的空格，就用 /^\s+$/ 去 match 吧

1 likes
flowerwrong #5 February 02, 2015

#3 楼 @blacktulip ''.emtpy? # true ' '.empty? # false这样到是麻烦了。还是正则表达式吧

params[:x].empty? == false && params[:x].blank? == true
1 likes
wxliuzifan #7 February 02, 2015

#5 楼 @flowerwrong 解决了。 你好，好淫

jasl #8 February 02, 2015

换个思路呢？去掉空格再判断咯~ params[:x].gsub(' ', '').blank?

blacktulip #9 February 02, 2015

#8 楼 @jasl 一樣，處理不了「沒東西」的情況

''.gsub(' ', '').blank?
 => true
jasl #10 February 02, 2015

#9 楼 @blacktulip 哦 看错问题了。。。

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