Question

我有以下字符串。

x = %q{ On the server side, my EJB3 application uses Spring for configuring all sorts of things. So my EJBs all look up various ApplicationContexts and use them as a sort of...well, I was going to say poor man's JNDI, but the reality is that JNDI in the J2EE environment is really a poor man's Spring. :-)

On the GUI side, I use it instead of resource injection to get access to my EJBs. That lets me test the GUI component with simple pojos. So ejb is very good technology}

我正在替换字符串"ejb"，不区分大小写。我这样做：

 y = x.gsub(/(ejb)/i, '<em>EJB</em>')
 # => " On the server side, my <em>EJB</em>3 application uses Spring for configuring all sorts of things. So my <em>EJB</em>s all look up various ApplicationContexts and use them as a sort of...well, I was going to say poor man's JNDI, but the reality is that JNDI in the J2EE environment is really a poor man's Spring. :-)\n\nOn the GUI side, I use it instead of resource injection to get access to my <em>EJB</em>s. That lets me test the GUI component with simple pojos. So <em>EJB</em> is very good technology"

我的小写匹配为"ejb"，我将替换为："<em>EJB</em>"。如何在不更换箱子的情况下更换它？我想要"<em>ejb</em>"。

Answer 1

x.gsub(/(ejb)/i, '<em>\1</em>')

Answer 2

你想：

gsub(/(ejb)/i, "<em>#{$1}</em>")

Answer 3

'test EjB123'.gsub(/ejb/i, "<em>#{$1}</em>")
 => "test <em>EjB</em>123"

Answer 4

您可能想尝试：

x.gsub!(/(ejb)/i) {|m| "<em>#{$~}<em>"}

Special global variables设置了一组Pattern matching：

$~ is equivalent to ::last_match;
$& contains the complete matched text;
$` contains string before match;
$' contains string after match;
$1, $2 and so on contain text matching first, second, etc capture group;
$+ contains last capture group.

欲了解更多信息： Ruby Regex

用红宝石中的实际单词替换

4 个答案: