This is a feature on chrome to separate between page logs, when you have the &quot;preserve logs&quot; option checked. It shouldn&#39;t show up if you uncheck that box and reload the page.

 It&#39;s just telling you that the browser change to another page.

Chrome is just telling you that the browser location changed to another page. You can stop it with the Chrome settings.
 
Just go to `Chrome inspect &gt; settings &gt; preferences &gt; network &gt; preserve log` and uncheck it.


Having looked over the man pages for `numpy`&#39;s [`eye`](http://docs.scipy.org/doc/numpy/reference/generated/numpy.eye.html) and [`identity`](http://docs.scipy.org/doc/numpy/reference/generated/numpy.identity.html), I&#39;d assumed that `identity` was a special case of `eye`, since it has fewer options (e.g. `eye` can fill shifted diagonals, `identity` cannot), but could plausibly run more quickly. However, this isn&#39;t the case on either small or large arrays:

    &gt;&gt;&gt; np.identity(3)                                                  
    array([[ 1.,  0.,  0.],
           [ 0.,  1.,  0.],
           [ 0.,  0.,  1.]])
    &gt;&gt;&gt; np.eye(3)                                                       
    array([[ 1.,  0.,  0.],
           [ 0.,  1.,  0.],
           [ 0.,  0.,  1.]])
    &gt;&gt;&gt; timeit.timeit(&quot;import numpy; numpy.identity(3)&quot;, number = 10000)
    0.05699801445007324
    &gt;&gt;&gt; timeit.timeit(&quot;import numpy; numpy.eye(3)&quot;, number = 10000)     
    0.03787708282470703
    &gt;&gt;&gt; timeit.timeit(&quot;import numpy&quot;, number = 10000)                   
    0.00960087776184082
    &gt;&gt;&gt; timeit.timeit(&quot;import numpy; numpy.identity(1000)&quot;, number = 10000)
    11.379066944122314
    &gt;&gt;&gt; timeit.timeit(&quot;import numpy; numpy.eye(1000)&quot;, number = 10000)     
    11.247124910354614

What, then, is the advantage of using `identity` over `eye`?


What are the advantages of using numpy.identity over numpy.eye?

I just noticed that using `{}` instead of `()` gives the same results when constructing an object.

    class Customer
    {
        public string name;
        public string ID {get; set;}
    }

    static void Main()
    {  
        Customer c1= new Customer{}; //Is this a constructor? 
        Customer c2= new Customer();
        
        //what is the concept behind the ability to assign values for properties 
        //and fields inside the {} and is not allowable to do it inside () 
        //without defining a constructor:
        
        Customer c3= new Customer{name= &quot;John&quot;, ID=&quot;ABC&quot;};
    }

Does `{}` act like `()` when creating a new object in C#?

Does { } act like ( ) when creating a new object in C#?

Chrome console shows me &quot;Navigated to http://localhost....&quot; in blue letters 

Image: 
![enter image description here][1]


  [1]: http://i.stack.imgur.com/gnYnA.jpg

Chrome console shows me &quot;Navigated to http://localhost....&quot;

<p>Chrome console shows me "Navigated to <a href="http://localhost...." target="_blank" rel="noopener noreferrer">http://localhost....</a>" in blue letters</p>
<p>Image:
<img src="http://i.stack.imgur.com/gnYnA.jpg" alt="enter image description here"></p>


I&#39;m looking for a method for JavaScript that returns true or false when it&#39;s empty... something like Ruby `any?` or `empty?`

    [].any? #=&gt; false
    [].empty? #=&gt; true




What is the equivalent of Array.any? in JavaScript?

I&#39;m sure it&#39;s somewhere inside the LoDash docs, but I can&#39;t seem to find the right combination.


    var users = [{
          id: 12,
          name: &#39;Adam&#39;
       },{
          id: 14,
          name: &#39;Bob&#39;
       },{
          id: 16,
          name: &#39;Charlie&#39;
       },{
          id: 18,
          name: &#39;David&#39;
       }
    ]
    
    // how do I get [12, 14, 16, 18]
    var userIds = _.map(users, _.pick(&#39;id&#39;));


LoDash: Get an array of values from an array of object properties

I am using Google Place API.

What I want to get suggestion of place for type helping.

So, what I have done is-

	var Google_Places_API_KEY = &quot;AIzaSyAK08OEC-B2kSyWfSdeCzdIkVnT44bcBwM&quot;;		//Get it from - https://code.google.com/apis/console/?noredirect#project:647731786600:access
	var language = &quot;en&quot;;		//&#39;en&#39; for English, &#39;nl&#39; for Nederland&#39;s Language


	var Auto_Complete_Link = &quot;https://maps.googleapis.com/maps/api/place/autocomplete/json?key=&quot;+Google_Places_API_KEY+&quot;&amp;types=geocode&amp;language=&quot;+language+&quot;&amp;input=Khu&quot;;
	$.getJSON(Auto_Complete_Link , function(result)
	{
		$.each(result, function(i, field)
		{
			//$(&quot;div&quot;).append(field + &quot; &quot;);
			//alert(i + &quot;==&quot;+ field);
			console.error(i + &quot;==&quot;+ field);
		});
	});
So in what link I am requesting is -

&gt; https://maps.googleapis.com/maps/api/place/autocomplete/json?key=AIzaSyAK08OEC-B2kSyWfSdeCzdIkVnT44bcBwM&amp;types=geocode&amp;language=en&amp;input=Khu

And if I go to this link with browser, I can get output like it (please try to ck)-

![11][1]

But if I try with jQuery&#39;s **.getJSON** or **.ajax**, I am getting my request blocked with this message-

![222][2].

SO the XMLHTTPRequest is blocked because of - 

&gt; No &#39;Access-Control-Allow-Origin&#39; header is present on the requested resource. Origin &#39;null&#39; is therefore not allowed access.

I have checked in [StackOverflow][3] for this problem solution and go through [here][4] and [here][5], but can&#39;t get my solution perfectly.

Can anyone please enlighten me?


  [1]: http://i.stack.imgur.com/reAGm.jpg
  [2]: http://i.stack.imgur.com/LvinM.jpg
  [3]: https://stackoverflow.com/
  [4]: https://stackoverflow.com/questions/20518524/no-access-control-allow-origin-header-is-present-on-the-requested-resource-or
  [5]: https://stackoverflow.com/questions/20035101/no-access-control-allow-origin-header-is-present-on-the-requested-resource

Google Place API - No &#39;Access-Control-Allow-Origin&#39; header is present on the requested resource. Origin &#39;null&#39; is therefore not allowed access

I&#39;ve read in several places that the key difference is that `this` is lexically bound in arrow functions. That&#39;s all well and good, but I don&#39;t actually know what that means.

I know it means it&#39;s unique within the confines of the braces defining the function&#39;s body, but I couldn&#39;t actually tell you the output of the following code, because I have no idea what `this` is referring to, unless it&#39;s referring to the fat arrow function itself....which doesn&#39;t seem useful.

    var testFunction = () =&gt; { console.log(this) };
    testFunction();

What does &quot;this&quot; refer to in arrow functions in ES6?

With this code:

    function baz() {
      var x = &quot;foo&quot;;
    
      function bar() {
        debugger;
      };
      bar();
    }
    baz();

I get this unexpected result:

![enter image description here][1]

When I change the code:

    function baz() {
      var x = &quot;foo&quot;;
    
      function bar() {
        x;
        debugger;
      };
      bar();
    }

I get the expected result:

![enter image description here][2]

Also, if there is any call to `eval` within the inner function, I can access my variable as I want to do (doesn&#39;t matter what I pass to `eval`).

Meanwhile, Firefox dev tools give the expected behavior in both circumstances.

What&#39;s up with Chrome that the debugger behaves less conveniently than Firefox? I have observed this behavior for some time, up to and including Version 41.0.2272.43 beta (64-bit).

Is it that Chrome&#39;s javascript engine &quot;flattens&quot; the functions when it can?

Interestingly if I add a second variable that *is* referenced in the inner function, the `x` variable is still undefined.

I understand that there are often quirks with scope and variable definition when using an interactive debugger, but it seems to me that based on the language specification there ought to be a &quot;best&quot; solution to these quirks. So I am very curious if this is due to Chrome optimizing further than Firefox. And also whether or not these optimizations can easily be disabled during development (maybe they ought to be disabled when dev tools are open?).

Also, I can reproduce this with breakpoints as well as the `debugger` statement.

  [1]: http://i.stack.imgur.com/WfCES.png
  [2]: http://i.stack.imgur.com/HpE66.png

Why does Chrome debugger think closed local variable is undefined?

Some will think this is not related to programming but I think it is, because most of the time when I encounter programming issues I search on Google to find solutions or ways to do what I plan to do before I start writing it from scratch. Let&#39;s face it, we all copy pasters...

I don&#39;t like to remove my hands from the keyboard. Google had a feature after you submit a query and press &lt;kbd&gt;Tab&lt;/kbd&gt; it will start navigating within the search results. Most likely because they had a tabindex attribute which was was removed.

Does anyone know why sometimes this works and sometimes it doesn&#39;t? I&#39;m starting to think I should create a Chrome app that will add the tab index to the results, but I don&#39;t want to do it before I am 100% sure this feature was removed.


Navigating Google search results using keyboard shortcuts

I recently developed a website that fetches mixed http/https content. Due to this, I always get the address bar displayed on top (It doesn&#39;t auto-hide like in other websites). Here&#39;s what I&#39;m talking about:  

![The Website][1]

[This][2] is the link to the website.

The content is fetched from various sources, hence filtering non-https content is not possible. And since the website is meant for reading, a non-full-screen display is painful for the reader. So, is there a way to force the auto-hide behavior? 

PS: The website uses Twitter Bootstrap, if it helps.  
PPS: I don&#39;t want to use the full-screen API, it&#39;ll be too heavy for this.


  [1]: http://i.stack.imgur.com/wRxSZm.png
  [2]: https://planetkde.org/

Force hide address bar in Chrome on Android

I have been looking for a way to alter a `XHR request` made in my browser and then replay it again.

Say I have a complete `POST` request done in my browser, and the only thing I want to change is a small value and then play it again. 
This would be a lot easier and faster to do directly in the browser.

I have googled a bit around, and haven&#39;t found a way to do this in Chrome or Firefox. 

Is there some way to do it in either one of those browsers, or maybe another one?

Edit and replay XHR chrome/firefox etc?

I&#39;m building a chrome extension written in TypeScript. I&#39;m using WebStorm and I added the `chrome-DefiniteltyTyped` library in my project.

However, when I write this in my typescript code : `chrome.extension.getURL`
I got an error : `cannot find name &#39;chrome&#39;`.

Because of this, my javascript file is not generated and I cannot use it in my extension.

Do you guys have any solution?

Using chrome extension apis in typescript

I have this problem with `po` in the console where trying to output a function works in itself, but outputting a variable or constant doesn&#39;t.

![first result is for `po bar.boy()`, second says `unresolved`][1]


  [1]: http://i.stack.imgur.com/G8qC1.png
As you can see here, although you&#39;d think the var/let holds the content of `bar.boy()`, Swift somehow can&#39;t find it...

`po` gives `error: &lt;EXPR&gt;:1:1: error: use of unresolved identifier`

I have found a few questions regarding this issue, yet none of them were helping with my problem. I am trying to save an object to core data using this code (which worked perfectly fine in Xcode 6 and Simulator...):

    let fetchRequest = NSFetchRequest(entityName: &quot;Patient&quot;)
    let fetchedResults : [NSManagedObject]!
    do {
        fetchedResults = try managedContext.executeFetchRequest(fetchRequest) as! [NSManagedObject]
        patienten = fetchedResults
    }    catch {
        print(&quot;error&quot;)
    }

I added the do-try-catch once I started working on this project in the Xcode 7 beta and a physical device. 
Now, when I hit the Save button, this piece of code is called, the app freezes and I get the following: 

&gt;warning: could not load any Objective-C class information from the dyld shared cache. This will significantly reduce the quality of type information available.

[![Screenshot][1]][1]

Does anybody know where I went wrong?


  [1]: https://i.stack.imgur.com/uXFX1.png

Swift 2, warning: could not load any Objective-C class information from the dyld shared cache

Is there a way to write to console / command prompt / powershell (like `Console.WriteLine()`) or anything similar in UWP apps?

If console is unavailable is there a proper alternative that I can use instead to write to the screen large amounts of text?

I, of course, can make a XAML control and output to it, but it doesn&#39;t seem to be convenient in comparison to simple `Console.WriteLine()`.

There is also very old discussion on [WPF console](https://stackoverflow.com/questions/160587/no-output-to-console-from-a-wpf-application), but nothing seems to work from there (at least, I couldn&#39;t find `Project-Properties-Application tab-Output Type-Console Application` and `Trace.WriteLine(&quot;text&quot;)` is unavailable).

How to output to console in UWP on Windows 10?

I fire an image tag when someone converts on our website for reporting and analytics:

    &lt;img src=&quot;https://example.evyy.net/conv/?somechannel=cats&amp;cid=3790&amp;oid=123&amp;cat1=premium&amp;sku1=123&amp;qty1=1&amp;amt1=456&amp;custid=qbc&quot; /&gt;

We noticed traffic decline yesterday. To debug I visited the site and signed up, with the console open network tab.

I typed &quot;evyy&quot; into the filter box and I see 3 line items for my tag. 

What does this mean? Should there not be just 1 line item? One item has a 302 status and the other two a status of 200. That&#39;s good right?

Screen attached. Does this look &quot;right&quot;? Is there any drill down in the network tab I can look at to see if there is a problem on our end with tracking?

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/P2HLp.png

What is &quot;initiator other&quot; in network in chrome console?

Since it automatically sets it for me in my `.env` file when I create the app, I&#39;m not sure when I should run it.

In addition to that, if a second developer comes in, and **clones** the app, does he/she need to run `php artisan key:generate` ? 

How do we know exactly when to run `php artisan key:generate` ?






When to generate a new Application Key in Laravel?

There is a very useful tool built in chrome dev tool, that I have just discovered. I even don&#39;t know its name, and I am not able to find it on google. I would say it is a pixel inspector tool.

I find the following method how to use it:

 1a. Inspect an html element with background color.

 1b. Define background color of an element.

 2.  Click on the color picker.
 3.  Move your mouse over any element on the page (not on the dev tool)

See: http://skalar.darkware.hu/skalkaz/Chrome-Colorpicker.gif

My questions:
What is this tool name?
How to use it easily? Most of the time I don&#39;t care the color, but I want to inspect the pixels of an icon.
Is there a hotkey of this tool?

How to use color picker (eye dropper)?

When developing client side javascript applications, the developer network panel is invaluable for debugging network issues:

![enter image description here][1]

How does a developer creating a NodeJS application monitor the network traffic from the nodejs application to a http/https server?  For example how to debug the following network traffic?

    var http = require(&#39;http&#39;);
    var req = http.request ...
    req.write ...
    req.send()

My code is making a call to a third party https server, so I am unable to use wireshark or similar packet sniffing tools.

For more information, the problem I am trying to investigate is [here][2].

EDIT:

Here are similar questions asking how to do the same thing in other languages:  

- PYTHON: https://stackoverflow.com/questions/10588644/how-can-i-see-the-entire-http-request-thats-being-sent-by-my-python-application
- JAVA: https://stackoverflow.com/questions/3246792/how-to-enable-logging-for-apache-commons-httpclient-on-android


  [1]: http://i.stack.imgur.com/Q6bWm.png
  [2]: https://stackoverflow.com/questions/28813523/error-socket-hang-up-using-node-v0-12-0

how to monitor the network on node.js similar to chrome/firefox developer tools?

[React Developer Tools](https://chrome.google.com/webstore/detail/react-developer-tools/fmkadmapgofadopljbjfkapdkoienihi?hl=en) give a lot of power to inspect the React component tree, and look at props, event handlers, etc. However, what I&#39;d really like to do is to be able to inspect those data structures in the browser console.

In chrome I can play with the currently selected DOM element in the console using `$0`. Is there a way to extract React component info from `$0`, or is it possible to do something similar with the React Dev Tools?

How do you inspect a react element&#39;s props &amp; state in the console?

I&#39;ve a following network log in chrome:

![network log][1]

I don&#39;t understand one thing in it: what&#39;s the difference between filled gray bars and transparent gray bars.

  [1]: http://i.stack.imgur.com/IJXd5.png

Understanding Chrome network log &quot;Stalled&quot; state

I am trying to log a long array so I can copy it quickly in my terminal. However, if I try and log the array it looks like:

    [&#39;item&#39;,
     &#39;item&#39;,
      &gt;&gt;more items&lt;&lt;&lt;
      ... 399 more items ]

How can I log the entire array so I can copy it really quickly? 

Dumping whole array: console.log and console.dir output &quot;... NUM more items]&quot;

`console.log` statements output nothing at all in Jest. This was working for me yesterday, and all of sudden, it&#39;s not working today. I have made zero changes to my config and haven&#39;t installed any updates.

I&#39;m not using the `--forceExit` option. Still seeing this issue.

Content Type	Original Author	Original Content on Stackoverflow
Question	lucasgabmoreno	View Question on Stackoverflow
Solution 1 - Javascript	skrawler	View Answer on Stackoverflow
Solution 2 - Javascript	Najmul Hossain Sayam	View Answer on Stackoverflow

Chrome console shows me "Navigated to http://localhost...."

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Does { } act like ( ) when creating a new object in C#?

What are the advantages of using numpy.identity over numpy.eye?

Attributions