javascript - Valid Object Constructors -

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निम्न में से कौन सा वैध ऑब्जेक्ट कन्स्ट्रक्टर हैं? 

  1) var m = फंक्शन ) {} 2) मीटर = समारोह () {} 3) m.prototype.constructor = समारोह () {}

ये सभी मान्य स्टेटमेंट होते हैं जो खाली फ़ंक्शन घोषित करते हैं, और इसे अलग-अलग चर में निर्दिष्ट करते हैं।

जावास्क्रिप्ट में प्रत्येक फ़ंक्शन ऑब्जेक्ट ही है (या f.prototype wouldn 'टी काम) और एक संभावित वस्तु निर्माता किसी भी कार्य को नया थिंगी वाक्यविन्यास (या शायद नया मी आपके उदाहरण में) के साथ कहा जा सकता है या इसे सामान्य रूप से कहा जा सकता है - केवल एक विशेष चीज नया करता है यह फ़े.प्रोटोटाइप से प्राप्त वस्तु के लिए है।

एक नव निर्मित फ़ंक्शन एक प्रोटोटाइप संपत्ति होती है जिसमें एक नया खनन वस्तु ( {} ) होता है, जिसमें एक छिपी निर्माता संपत्ति को इंगित करने के अलावा कोई गुण नहीं है ( यह एक परिपत्र संदर्भ है, वास्तव में)

यह सच होना चाहिए कि: 

  var m = function () {}; M.prototype.constructor == m;

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