javascript - How to count the number of elements in this json object? -

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इस सवाल का पहले से ही एक उत्तर है: < / P>

  • 15 उत्तर
  • 9 जवाब

मैं जावास्क्रिप्ट में इस JSON ऑब्जेक्ट के लिए तत्वों की संख्या प्राप्त करना चाहता हूं। 

  डेटा = {name_data : {नाम: "डीडी",}}}   
 सही उत्तर होना चाहिए 4. मेरा कोड  डेटा है। Name_data.length  लेकिन यह एक अपरिभाषित ऑब्जेक्ट देता है। इस JSON ऑब्जेक्ट में तत्वों की सही संख्या जावास्क्रिप्ट में कैसे प्राप्त की जा सकती है?

यह फ़ंक्शन आपको मदद कर सकता है

<पूर्व> फ़ंक्शन की लंबाई (ओबीजे) {लौटें ऑब्जेक्ट.कीज़ (ओबीजे)। लम्बाई; }

अब आप इस फ़ंक्शन को इस तरह कॉल कर सकते हैं 

  लंबाई (डेटा); // 1 लंबाई (डेटा। नाम_डेटा) / / 4 रिटर्न देता है

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