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

-

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

Comments

Post a Comment

Popular posts from this blog

Folder list php -

-
I want to list folder names in the list. There is a file to show the folder name. There is already a problem, please do a test. Another code would be OK. & lt ;? Php function getFileList ($ folder name, $ fileType = "") {if (substr ($ folderName, strlen ($ folderName) - 1)! = "/") {$ Folder name. = '/'; } Foreach (Globe ($ folderName. '*'. $ FileType) $ filename) {if_dir ($ filename)) {$ type = 'folder'; } And {$ type = 'file'; } Echo str_replace ($ folderName, '', $ filename. ' '); }} // call function getFileList ('folder name'); // List of all files? & Gt; & Lt; Select class = "form" name = "userlevel" size = "1" & gt; & Lt; Option value = "& lt ;? php getFileList ('theme') ;? & gt;" & Gt; فولدر 1 & lt; / Options & gt; & Lt; Option value = "& lt ;? php getFileList ('theme') ;? & gt;" ...
Read more

objective c - How to open front/back camera at the same time in iOS developing? -

-
I want to use the front and rear camera at the same time in iOS development: when I take a photo back After the camera, the front camera can be opened and another can take a photo. By the way, these two photos are in a picture: vertical arrangement. Has anyone done this before? UIImagePickerController to take the picture, and to determine which camera is used Is in. / P> To merge the pictures, I found an example through search (its recommendation in the future)
Read more

GO: Serve static pages -

-
I'm trying to display a static page with Go. Go: Package main import "net / http" function main () {fs: = http.FileServer (http.Dir ("static / house")) Http: .handle ("/", fs) http.ListenAndServe (": 4747", zero)} directory: project / stable home Html edit.html project.go When I run it, the web page displays links to edit.html and home.html instead of displaying a static page from home.html is. What am I doing wrong. Is this the best way to serve files? I know that there are other ways like From the HTML / templates package, but I'm not sure what is the difference between each of these methods and when. Thanks! fancy main () {http.Handle ("/", http.FileServer (Http) .ir ("static")) http.ListenAndServe (": 4747", zero)} You do not need static / home , just Static . and when you do not have index.html in / static , the directory instead Content appears. Just change the name of...
Read more