javascript - Object instances share sub-properties? -

-

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

  • 2 जवाब

    निम्नलिखित कोड को देखते हुए: < / p> 

      var कार = फ़ंक्शन () {}; Car.prototype = {wheels: {rims: 'steel'}} var volvo = new car; Var मर्सिडीज = नई कार; Volvo.wheels.rims = 'एल्यूमीनियम'; Console.log (volvo.wheels.rims, mercedes.wheels.rims); // 'एल्यूमीनियम', 'एल्यूमीनियम'   
     क्या आप समझा सकते हैं कि उदाहरण  मर्सिडीज  का  ऑटो  स्वचालित रूप से उप-संपदा परिभाषा  rims  से  वोल्वो    
     ध्यान दें कि निम्न कोड एक ही सेटअप के साथ अपेक्षित काम करता है:  
      volvo.wheels = 4; console.log (volvo.wheels, मर्सिडीज। wheels); // 4, ऑब्जेक्ट {रिम्स: 'स्टील'}    
     
     
     आप केवल एक ही बना सकते हैं  पहियों  के लिए एक ऑब्जेक्ट।  
     आप इस ऑब्जेक्ट को प्रोटोटाइप पर असाइन करते हैं, इसलिए प्रत्येक इंस्टॉलेशन उसके मान को संभालता है।  
     जावास्क्रिप्ट  कभी नहीं  स्वचालित रूप से एक ऑब्जेक्ट की प्रतिलिपि बनाएँ।  
     इसके बजाय, आपको कन्स्ट्रक्टर में ऑब्जेक्ट बनाना चाहिए ताकि आप प्रत्येक आवृत्ति के लिए एक नया ऑब्जेक्ट प्राप्त कर सकें।

Comments

Post a Comment

Popular posts from this blog

php - PDO bindParam() fatal error -

-
I am trying to learn PDO, now I have written this small code, but it gives me a serious error: Fatal error: Call a member function at a non-object dot () ... $ con = new mysqli ("127.0.0.1", "root", "", "csvdangercheck"); $ Query = $ con- & gt; ("Id,` var1`, `var2`) values ​​(" id,: var1,: var2) ";); $ query- & gt; bypass pattern (': id', $ id); $ query- & gt; BindParam (': var1', $ VAL1); $ Query- & gt; bindParam (': var2', $ val2); $ Query-> Executed (); I Trying to use print_r ($ con-> errorInfo ()) but Fatal error: Undefined method mysqli :: errorInfo ( ) ... can someone tell me what am I missing? Flaffeh said, you have PDO Missing Mysqy, try it: $ con = new PDO ('mysql: host = 127.0.0.1; dbname = csvdangercheck', 'root', '');
Read more

php - How can I cram 6+31 numeric characters into 22 alphanumeric characters? -

-
I have a 6 digit number and a 31-digit number (such as "234536" and "201103231043330478311223582826") that I The API needs to be crawled in the same 22-character alphanumeric field that uses PHP. I tried to convert each one to 32 (using custom code could not handle the base_convert () large number) and to connect with a single-character delimiter, but It only gives me 26 characters This is a restore API, so the letters should be URI-protected. I would like to do a database table cross with two references without reference to another reference value, if possible, any suggestions? Instead use a radix of 62. This will give you 22 characters for the top, 3.35 for the pre and 17.3 for the next. & gt; & Gt; & Gt; Math.log (10 ** 6) /math.log (62) 3.3474826039165504 & gt; & Gt; & Gt; Math.log (10 ** 31) /math.log (62) 17.295326786902177
Read more

logging - How can I log both the Request.InputStream and Response.OutputStream traffic in my ASP.NET MVC3 Application for specific Actions? -

-
For a specific set of tasks, I need to log in to the incoming request inputstream as well as outgoing response. is. I am using an ActionFilterAttribute for this and overriding the OnActionExecuted and OnResultExecuted methods. So I'm starting with this idea ... Public category ActionLoggerAttribute: ActionFilterArrbit {Public Override Zero On-Offed Execution (ActionActioned Contact Filter Filter) {base.OnActionAxecuted (FilterContext); HttpRequestBase request = filterContext.HttpContext.Request; // TODO: Log the request. InputStream} Public Override Zero OnResultExecuted (ResultExecutedContext FilterContext) {base.OnResultExecuted (filterContext); HTTPRPSPointBase Response = FilterContacts Hpptex response; // TODO: Log on Response.OutputStream}} Ideally I'll hook it up with enterprise library logging because I'm already using it for error logging. Am I reaching the input and output stream at the right time? Can I easily use the Enterprise Library to log i...
Read more