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11.11 最強折扣反應熱烈!
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11.11 最強折扣反應熱烈!
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什麼時候可以在電子郵件地址中使用下劃線?

首先,下劃線是一種多功能標點符號,可以以多種方式使用。它可用於連接單詞(例如,“a_b”)、創建強調(例如,“a__b__c”)或指示空格(例如,“a_ b”)。但如何以及何時使用它呢?

一般來說,電子郵件地址中允許使用下劃線。然而,下劃線的使用因電子郵件提供商而異。例如,許多大型提供商(例如 Gmail、Yahoo 和 Hotmail)不允許電子郵件地址包含下劃線。此外,某些服務可能會對您的用戶名或地址中可以使用的字符進行限制,這意味著如果不支持,您可能無法創建包含下劃線的地址。

話雖這麼說,您仍然會發現許多較小的提供商允許在電子郵件中使用下劃線 - 例如 ProtonMail 和 ConvertKit 都允許用戶將下劃線包含在他們的地址中。需要注意的是,雖然您在向這些提供商註冊時的地址中可能包含下劃線,但如果包含下劃線,他們並不保證所有發送的電子郵件都能正確到達。

另一個值得考慮的點是,某些服務器可能會在發送之前從傳入的電子郵件中刪除下劃線,從而導致即使收件人的收件箱成功接收,也無法檢索它們。這意味著在註冊新帳戶或第一次發送消息時最好避免使用它們,除非您知道提供商支持該字符沒有任何問題。

我可以在 URL 中使用下劃線嗎?

是的,URL 中允許使用下劃線。下劃線字符 (_) 是 URL 中的有效字符,可以用作地址的路徑或文件名的一部分。這意味著每當您鏈接到另一個網頁、圖像或文件時,您都可以添加下劃線作為資源路徑的一部分或直接在其名稱中添加下劃線。

值得注意的是,某些瀏覽器可能無法正確呈現包含下劃線的鏈接。因此,如果您決定在創建 URL 時使用它們,請記住,根據某些用戶的瀏覽器設置,它可能無法正確打開。

在構建主網站地址時,您還應該盡量避免使用下劃線;出於 SEO 和用戶體驗的原因,而是選擇連字符 (-) 作為常見的最佳實踐。連字符比下劃線更容易閱讀並且通常更容易識別;使它們更適合前端網址。

域名中可以使用下劃線嗎?

儘管下劃線作為域名的一部分已被越來越多的人接受,但在註冊網站或發送電子郵件時,它們的處理方式仍然與其他字符不同。一般來說,域名字符串中可以包含下劃線,但其使用往往受到所選服務提供商的限制。

例如,許多流行的註冊商不允許您註冊包含下劃線字符的新域。儘管有些在創建子域(如 mail_server.example.com)時可能允許它們,但如果您嘗試創建具有多個下劃線的地址(如 news__updates.example.com),它們將不起作用。

還值得注意的是,一些網絡託管公司可能不支持在默認配置中包含下劃線的域,因此最好在向項目投入任何時間和金錢之前與您的提供商仔細檢查。一旦在服務器端完成所有設置,如果隱藏的問題開始出現,這可以為您省去更多的麻煩。

下劃線是特殊字符嗎

下劃線,有時稱為下劃線,是一種佔據自己空間的特殊字符。它可以在傳統打字機和計算機鍵盤以及數字通信(例如短信或電子郵件)中找到。下劃線在寫作和編碼中具有多種用途,例如指示斜體、顯示強調、加強單詞、在相似拼寫的單詞之間提供清晰度、分隔包含在同一短語中的多個單詞以及在不破壞現有單詞的情況下添加信息。

文件名中必須有下劃線嗎?

文件名中經常使用下劃線來分隔單詞。在文件名中使用下劃線可以使其更易於閱讀,特別是當名稱由多個單詞組成時。下劃線還可以用來使文件更有條理,因為它們可以更容易地識別文件的類型以及它應該放在哪裡。此外,有時在文件名中使用下劃線來替換空格,這可以提高與不支持文件名中空格的設備和操作系統的兼容性。

下劃線可以是複數嗎

是的,下劃線可以是複數。包含下劃線的單詞的複數形式是通過在下劃線後添加“s”來形成的(例如,_es)。在書寫或談論多個下劃線或下劃線實例時,請務必注意單詞的拼寫方式。例如,當同時引用多個下劃線時,正確的拼寫是“underscores”,而不是“underlines”。

在應用程序中使用下劃線有哪些問題?

使用某些並非設計用於處理下劃線的應用程序時,可能會遇到下劃線問題。例如,如果您在命令提示符窗口中輸入目錄路徑,則可能很難輸入下劃線,因為該字符通常用作特定操作的快捷方式。此外,某些程序無法將下劃線識別為文件名中的有效字符,並且在遇到下劃線時會兌現或給出錯誤消息。

如何在字母下劃線?

要為字母添加下劃線,您可以按住 Shift 鍵,同時按破折號 (-) 鍵。這將在字母下方創建一個下劃線字符。例如,_A 將生成一個下面帶有下劃線的 A。此外,某些程序允許您使用“插入符號”功能插入符號(例如,Microsoft Word)。

什麼時候在變量名中使用下劃線?

下劃線字符經常用於編程語言中的變量和函數名稱。這允許程序員為對象和函數創建更有意義、更易讀的名稱,而不是使用駝峰命名法或其他語法。例如,可以將變量命名為“_getNumber”而不是“getNumber”,以強調其作為檢索功能的用途。它還在計算機文件路徑中用作兩個單詞或短語之間的分隔符。

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