无瑕的程式码

Jul 1, 20190 likes78 views

Abby Lai

讀書分享 --- 无瑕的程式码什麼是Clean code

當我們在編輯的時候...
如果你錄下你寫code的動作，重播畫?面?大致上如下：
? Abby打開了了專案。
? 他往下捲找到要修改的函?示。
? 他停下來來思考要做什什麼。
? 喔，他往上捲，移動到模組的頂端，檢查變數的初始狀狀況。
? 他向下捲回到原本的地?方，然後開始打字。
? 哇，他刪掉他剛輸入的東?西。
? 他要輸入某樣東?西，但才打了了?一半，?又?馬上刪掉。
? 他向下捲?至另?一個函式，該函式會呼叫他剛修改的函式，他想看看他是如何呼叫函式的。
? 他捲回到原本的地?方，?又再次輸入了了他剛剛刪掉的程式碼。
? 他檢查另?一個?子類別，想看看這個函式是否有被overrideen...

為什什麼我們需要Clean Code?
? 當我們要撰寫新的程式碼前，其實先花了了不少功
夫在不斷地暸解舊的程式碼。
? 讓程式碼更更易易閱讀，也會讓程式碼變得更更容易易撰
寫。
? 程式碼的可讀性非常重要。

不好的程式碼
? 程式碼將?一直存在
? 劣質的程式碼?
- 急於將產品上市，並加入越來來越多的產品特點，直
到無法管理理 -> 倒閉。
? 雜亂程式的代價?
- 修改導致更更多混亂，團隊產能下降。
? 富麗堂皇的新設計?
- 新團隊的成員離開，現在的成員要求再重新設計。?

態度
? 你是否遇過本來來只要花幾個?小時就可以完成的事，
卻讓你痛不欲?生了了好幾個禮拜？
? 也許你會說，原因是：
1. 需求?一變再變，違背了了原本的設計。
2. 開發進度過於緊湊。
? 錯誤不在這些事物，?而是我們本?身，不夠專業。

我們不夠專業
為什什麼我們不夠專業：
1. 主管和商?人必須從我們這裡獲取資訊，進?而去做出保
證和承諾。
2. 使?用者要我們驗證需求在系統中是否可?行行
3. 專案管理理者尋求我們的協助和意?見見，才能排出進度表
? 所以，保護程式碼，是我們的?工作。

醫?生不洗?手
? 如果你是?一位醫?生，有?一位病患要求你不要像傻?子般
在?手術前洗淨雙?手，因為洗?手會花太多時間？
? 病患＝老闆
? 醫?生完全應該拒絕遵守這種需求。
? 因為醫?生知道更更多關於疾病與感染的風險，如果醫?生
屈服，那就顯得太不專業了了。
? 同理理，如果?工程師遵守不懂劣質程式碼風險的主管的
意願，這些程式設計師也顯得相當不專業。

讓開發速度變快的唯?一?方法
? 爛程式只會讓你的開發速度變得更更慢
? 讓開發速度變快的唯?一?方法： ?
隨時都確保程式碼盡可能的整?齊潔淨。

Clean Code將帶給我們
? 暸解優良程式設計師的思維
? 了了解他们所使?用的程式技巧、技术和开发的?工具。

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