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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                * 需要插值與嵌入雙引號的單行字符串使用?`%()`?(是?`%Q`?的簡寫)。多行字符串,最好用 heredocs 。 ~~~ # 差(不需要插值) %(<div class="text">Some text</div>) # 應該使用 '<div class="text">Some text</div>' # 差(沒有雙引號) %(This is #{quality} style) # 應該使用 "This is #{quality} style" # 差(多行) %(<div>\n<span class="big">#{exclamation}</span>\n</div>) # 應該是一個 heredoc # 好(需要插值、有雙引號以及單行) %(<tr><td class="name">#{name}</td>) ~~~ * 沒有?`'`?和?`"`?的字符串不要使用?`%q`。除非需要插值,否則普通字符串可讀性更好。 ~~~ # 差 name = %q(Bruce Wayne) time = %q(8 o'clock) question = %q("What did you say?") # 好 name = 'Bruce Wayne' time = "8 o'clock" question = '"What did you say?"' ~~~ * 只有正則表達式要匹配多于一個的?`/`?字元時,使用?`%r`。 ~~~ # 差 %r{\s+} # 好 %r{^/(.*)$} %r{^/blog/2011/(.*)$} ~~~ * 除非調用的命令中用到了反引號(這種情況不常見),否則不要用?`%x`?。 ~~~ # 差 date = %x(date) # 好 date = `date` echo = %x(echo `date`) ~~~ * 不要用?`%s`?。社區傾向使用?`:"some string"`?來創建含有空白的符號。 * 用?`%`?表示字面量時使用?`()`,?`%r`?除外。因為?`(`?在正則中比較常用。 ~~~ # 差 %w[one two three] %q{"Test's king!", John said.} # 好 %w(one tho three) %q("Test's king!", John said.) ~~~
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