Yes. From the [spec][1],

&gt;  - Let *selected* be the result of calling the [[Call]] internal method of *callbackfn* with *T* as the this value and argument list containing *kValue*, *k*, and *O*.
&gt;  - If [ToBoolean][2](*selected*) is **true**, then
&gt;
&gt;     - Call the [[DefineOwnProperty]] internal method of *A* with arguments [ToString][3](*to*), [Property Descriptor][4] {[[Value]]: *kValue*, [[Writable]]: **true**, [[Enumerable]]: **true**, [[Configurable]]: **true**}, and **false**.
&gt;     - Increase *to* by 1.

So the items in the returned array have the same order than in the original one.


  [1]: https://es5.github.io/#x15.4.4.20
  [2]: http://www.ecma-international.org/ecma-262/5.1/#sec-9.2
  [3]: http://www.ecma-international.org/ecma-262/5.1/#sec-9.8
  [4]: http://www.ecma-international.org/ecma-262/5.1/#sec-8.10

Yes, the `.filter()` method returns a new array, without the filtered elements in the same order as initially.

The order of the elements is one of the main feature of a array.

While I am try to run an app in the **iOS 10 simulator** using `xcode8` I get these alerts frequently. They randomly appear two at a time and it is not apparent what is triggering them.

Below is Image for Error I got. 

[![Error Screen shot.][1]][1]

I tried Following things. 

 - Clean &amp; Rebuild an app
 - Restart xcode &amp; Simulator
 - Clear Derived Data &amp; Rebuild application.

  [1]: http://i.stack.imgur.com/hauBO.png

Xcode 8 | iOS 10 simulator &quot;Error returned in reply: Connection invalid&quot;

I found really weird bug that is reproduced only on Android N devices.

In tour of my app there is a possibility to change language. Here is the code that changes it. 

     public void update(Locale locale) {

        Locale.setDefault(locale);

        Configuration configuration = res.getConfiguration();

        if (BuildUtils.isAtLeast24Api()) {
            LocaleList localeList = new LocaleList(locale);

            LocaleList.setDefault(localeList);
            configuration.setLocales(localeList);
            configuration.setLocale(locale);

        } else if (BuildUtils.isAtLeast17Api()){
            configuration.setLocale(locale);

        } else {
            configuration.locale = locale;
        }

        res.updateConfiguration(configuration, res.getDisplayMetrics());
    }


This code works great in activity of my tour ( with `recreate()` call) but in all next activities all String resources are wrong. Screen rotation fixes it. What can i do with this problem? Should i change locale for Android N differently or it&#39;s just system bug?

P.S. Here&#39;s what i found. At first start of MainActivity (which is after my tour) `Locale.getDefault()` is correct but resources are wrong. But in other activities it gives me wrong Locale and wrong resources from this locale. After rotation screen (or perhaps some other configuration change) `Locale.getDefault()` is correct.

Android N change language programmatically

I looked at the documentation and while looking at examples it looks like filter preserves order of the original list (though it returns a new one). Can I rely on that?

&lt;a href=&quot;http://www.ecma-international.org/ecma-262/5.1/#sec-15.4.4.20&quot;&gt;Ecmascript spec&lt;/a&gt;

&lt;a href=&quot;https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter&quot;&gt;MDN&lt;/a&gt;

Neither of these reference preserving order. Should I just assume I can&#39;t rely on preserved order?

Does Javascript filter preserve order?

I looked at the documentation and while looking at examples it looks like filter preserves order of the original list (though it returns a new one). Can I rely on that?
<a href="<a href=" http:="" www.ecma-international.org="" ecma-262="" 5.1="" #sec-15.4.4.20&#x26;quot;&#x26;gt;ecmascript&#x22;="">http://www.ecma-international.org/ecma-262/5.1/#sec-15.4.4.20">Ecmascript</a> spec
<a href="<a href=" https:="" developer.mozilla.org="" en-us="" docs="" web="" javascript="" reference="" global_objects="" array="" filter&#x26;quot;&#x26;gt;mdn&#x26;lt;="" a&#x22;="">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter">MDN&#x3C;/a</a>>
Neither of these reference preserving order. Should I just assume I can't rely on preserved order?

So, I&#39;m testing a component that relies on an event-emitter. To do so I came up with a solution using Promises with Mocha+Chai:

    it(&#39;should transition with the correct event&#39;, (done) =&gt; {
      const cFSM = new CharacterFSM({}, emitter, transitions);
      let timeout = null;
      let resolved = false;
      new Promise((resolve, reject) =&gt; {
        emitter.once(&#39;action&#39;, resolve);
        emitter.emit(&#39;done&#39;, {});
        timeout = setTimeout(() =&gt; {
          if (!resolved) {
            reject(&#39;Timedout!&#39;);
          }
          clearTimeout(timeout);
        }, 100);
      }).then((state) =&gt; {
        resolved = true;
        assert(state.action === &#39;DONE&#39;, &#39;should change state&#39;);
        done();
      }).catch((error) =&gt; {
        assert.isNotOk(error,&#39;Promise error&#39;);
        done();
      });
    });

On the console I&#39;m getting an &#39;UnhandledPromiseRejectionWarning&#39; even though the reject function is getting called since it instantly shows the message &#39;AssertionError: Promise error&#39;

&gt; (node:25754) UnhandledPromiseRejectionWarning: Unhandled promise
&gt; rejection (rejection id:  2): AssertionError: Promise error: expected
&gt; { Object (message, showDiff, ...) } to be falsy
&gt; 1) should transition with the correct event

And then, after 2 sec I get 

&gt;  Error: timeout of 2000ms exceeded. Ensure the done() callback is
&gt; being called in this test.

Which is even weirder since the catch callback was executed(I think that for some reason the assert failure prevented the rest of the execution)  
   
Now the funny thing, if I comment out the `assert.isNotOk(error...)` the test runs fine without any warning in the console. It stills &#39;fails&#39; in the sense that it executes the catch.  
But still, I can&#39;t understand these errors with promise. Can someone enlighten me?

Getting a UnhandledPromiseRejectionWarning when testing using mocha/chai

My app screen has a View component with few Text Inputs. I cannot disable text inputs. Is there a way that I can disable complete View?

P.S.: By Disabling a View component I mean that the component renders but becomes unresponsive of any action.

Can I disable a View component in react native?

Googling for &quot;javascript clone object&quot; brings some really weird results, some of them are hopelessly outdated and some are just too complex, isn&#39;t it as easy as just:

    let clone = {...original};

Is there anything wrong with this?

Is this a good way to clone an object in ES6?

Here&#39;s what I tried and how it goes wrong.

This works:

    &lt;div dangerouslySetInnerHTML={{ __html: &quot;&lt;h1&gt;Hi there!&lt;/h1&gt;&quot; }} /&gt;

This doesn&#39;t:

    &lt;div dangerouslySetInnerHTML={{ __html: this.props.match.description }} /&gt;

---

The description property is just a normal string of HTML content. However it&#39;s rendered as a string, not as HTML for some reason.

[![enter image description here][1]][1]

Any suggestions?


  [1]: http://i.stack.imgur.com/cI25q.png

Render HTML string as real HTML in a React component

I have an app using passport.js to log in users through facebook, and am attempting to use express-mysql-session to persist their login states. If I don&#39;t include the express-mysql-session code, the passport serializeUser and deserializeUser functions hit fine...however when I un-comment the code that attempts to store their session with express-mysql-session, the deserializeUser function doesn&#39;t get hit, and the user never gets properly logged in.

server.js file

    var express      = require(&#39;express&#39;);
    var mysql		 = require(&#39;mysql&#39;);
    var passport     = require(&#39;passport&#39;);
    var session      = require(&#39;express-session&#39;);
    var MySQLStore   = require(&#39;express-mysql-session&#39;)(session);
    
    if (typeof process.env.OPENSHIFT_MYSQL_DB_HOST === &quot;undefined&quot;){
    	var options = {
    		host     : &#39;localhost&#39;,
    		port     : &#39;3307&#39;,
    		user     : &#39;user&#39;,
    		password : &#39;password&#39;,
    		database : &#39;database&#39;,
    		socketpath: &#39;/var/run/mysqld/mysqld.sock&#39;
    	}
    } else { 
    	var options = {
    		host     : process.env.OPENSHIFT_MYSQL_DB_HOST,
    		port     : process.env.OPENSHIFT_MYSQL_DB_PORT,
    		user     : process.env.OPENSHIFT_MYSQL_DB_USERNAME,
    		password : process.env.OPENSHIFT_MYSQL_DB_PASSWORD,
    		database : process.env.OPENSHIFT_APP_NAME,
    		socket	 : process.env.OPENSHIFT_MYSQL_DB_SOCKET
    	}
    };	  
    
    var connection = mysql.createConnection(options);
    
    var sessionStore = new MySQLStore({
        checkExpirationInterval: 900000,// How frequently expired sessions will be cleared; milliseconds.
        expiration: 86400000,// The maximum age of a valid session; milliseconds.
        createDatabaseTable: false,// Whether or not to create the sessions database table, if one does not already exist.
    	connectionLimit: 1,
        schema: {
            tableName: &#39;LoginRequests&#39;,
            columnNames: {
                session_id: &#39;loginID&#39;,
                expires: &#39;expires&#39;,
    			data:&#39;data&#39;
            }
        }
    }, connection);

     self.initializeServer = function() {
            self.app = module.exports = express();
            self.app.configure(function() {
    			self.app.set(&#39;views&#39;, __dirname + &#39;/public&#39;);
                self.app.set(&#39;view engine&#39;, &#39;html&#39;);
    			self.app.engine(&#39;html&#39;, require(&#39;hogan-express&#39;));
    			self.app.enable(&#39;view cache&#39;);
                self.app.use(express.favicon());
                self.app.use(express.logger(&#39;dev&#39;));
                self.app.use(express.bodyParser());
                self.app.use(express.methodOverride());
                self.app.use(express.cookieParser(&#39;secret&#39;));
    			self.app.use(session({
    			    key: &#39;session_cookie_name&#39;,
    			    secret: &#39;secret&#39;,
    			    cookie: {maxAge: 3600000, secure:false},
    			    store: sessionStore,
    			    resave: false,
    			    saveUninitialized: false
    			}));
    			// required for passport
    			self.app.use(passport.initialize());
    			self.app.use(passport.session()); // persistent login sessions
                self.app.use(express.static(path.join(__dirname, &#39;public&#39;)));
                self.app.use(&#39;/public&#39;,express.static(__dirname, &#39;/public&#39;));
                self.app.use(self.app.router);
                //self.app.use(require(&#39;stylus&#39;).middleware(__dirname + &#39;/public&#39;));
    
    			
    		});
            
        require(&#39;./routes/site.js&#39;);  
    	require(&#39;./config/passport.js&#39;)(passport); // pass passport for configuration 
    	 
        }

So, if I comment out the &quot;store&quot; option in the session object above, the passport functions get hit. If I leave this line un-commented, the deserializeUser function does not get hit. 

Passport functions

    passport.serializeUser(function(user, done) {
    		console.log(&#39;you have been serialized!&#39;);
    			done(null, user.id);
    	});
     	
    	
    	// used to deserialize the user
    	passport.deserializeUser(function(id, done) {
    		console.log(&#39;you have been deserialized!&#39;);
    		connection.query(&quot;SELECT * FROM Users WHERE id = &quot;+id,function(err,rows){
    			done(err, rows[0]);
    		});
    	});

EDIT

Mor Paz suggested that I include some of the logs from when I run my server with the debug module. Below are the logs right before, and immediately after the user is serialized. The user should be deserialized at some point near this, but never is.

    GET /auth/facebook 302 81ms - 412b
    express-mysql-session:log Getting session: oNcJ4UapxCY_zKOyfSBTUWaVhaNZuFRq +356ms
    you are a user!
    you have been serialized!
      express-mysql-session:log Setting session: tgRPY-Mb1VDP2zaSMOFhlf_IWFhVpTia +798ms
      express-mysql-session:log Getting session: tgRPY-Mb1VDP2zaSMOFhlf_IWFhVpTia +6ms
    GET /auth/facebook/callback?    code=AQCWPvA5ZRMYoTueW6_wWU49Up5ggjW68ufOtiYkU5IzhRjSNyyWnzlQVprgQo_uubQkEVvNI0yo53ET3cWBnDAHUGmAXPBy_ITEmC-biE2KEGEr0iCm_cqjuG90nnePY-k9U2oFUbX2kvLgMeM0kZ-094EHiU_NJjmAJNj6mzTkSE47935RhJy0Tba_sYS88_C0N3kn5f5kcoTC4KsgW1gBHWWJAwZ68Lj94ffVe2hN97580CtzEpJa0wwQHwTBYfmjQ0NfUdx07m4rXW9R7PR06aHDcUDrYqR9Kb0LWq4sZLbQjV5rI7gzkWG-huhq7IY 302 825ms - 72b
      express-mysql-session:log Setting session: Xo9OjfmJzTFp1CSF6srLi_UyxTCLg-EI +56ms
      express-mysql-session:log Getting session: Xo9OjfmJzTFp1CSF6srLi_UyxTCLg-EI +23ms
      express-mysql-session:log Getting session: Xo9OjfmJzTFp1CSF6srLi_UyxTCLg-EI +2ms
    GET /profile 200 84ms - 4.22kb


Content Type	Original Author	Original Content on Stackoverflow
Question	ford prefect	View Question on Stackoverflow
Solution 1 - Javascript	Oriol	View Answer on Stackoverflow
Solution 2 - Javascript	Rikard	View Answer on Stackoverflow

Does Javascript filter preserve order?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Android N change language programmatically

Xcode 8 | iOS 10 simulator "Error returned in reply: Connection invalid"

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