javascript definition guide(javascript權威指南)第六章 Example 6-2裡一個小錯誤

來源:互聯網
上載者:User

javascript definition guide(javascript權威指南)第六章 Example 6-2裡的例子有一個小錯誤

/*** Copy the enumerable properties of p to o, and return o.* If o and p have a property by the same name, o's property is overwritten.* This funcdtion does not handle getters and setters or copy attributes.*/function extend(o, p){for (prop in p)o[prop] = p[prop];return o}/*** Return a new object that holds the properties of both o and p.* If o and p have properties by the same name, the values from o are used*/function union(o, p) {return extend(extend({}, o), p);}

這裡的union函數實現,如果o和p有相同的屬性,o的屬性還是會被p中的屬性覆蓋。

正確的函數應該是:

function union(o, p) {return extend(p, extend({}, o));}
相關文章

Alibaba Cloud 10 Year Anniversary

With You, We are Shaping a Digital World, 2009-2019

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。