Clear Cache in Safari version 7 on Mac OSX


You have two options to clear the cache in Safari version 6:
Use the &quot;Empty Caches&quot; option
Select which items you want to clear by using the &quot;Reset&quot; option

I&#39;m reading the book *Learning JavaScript Design Patterns* recently. What I don&#39;t get is the difference between module pattern and revealing module pattern. I feel they are the same thing. Anyone can give an example?

JavaScript design pattern: difference between module pattern and revealing module pattern?

I want to get all the remaining unused arguments at once. How do I do it?

    parser.add_argument(&#39;-i&#39;, action=&#39;store&#39;, dest=&#39;i&#39;, default=&#39;i.log&#39;)
    parser.add_argument(&#39;-o&#39;, action=&#39;store&#39;, dest=&#39;o&#39;, default=&#39;o.log&#39;)


    


Getting the remaining arguments in argparse

In Safari 7, the main html file with a manifest is loadable when offline, but none of the external resources are loaded, even if they&#39;re listed in the manifest file as cached. Safari&#39;s resource pane lists the files as in the application cache, but it will not load them. I&#39;ve tried an extremely simple test, checked MIME type of the manifest file, renamed the manifest file, and tried other demos. Here&#39;s an example that works fine on Chrome, but on Safari it will not load the sticky image when offline: http://htmlfive.appspot.com/static/stickies.html

This is the same problem described in https://stackoverflow.com/questions/20655771/appcache-misbehaving-in-safari-firefox, but I think that question doesn&#39;t make the problem as clear, and I wanted to provide a question with a concrete demo. Is there a work-around, or does Safari 7 totally not support application cache beyond the primary html file? Thanks!

Safari 7 application cache does not work

<p>In Safari 7, the main html file with a manifest is loadable when offline, but none of the external resources are loaded, even if they're listed in the manifest file as cached. Safari's resource pane lists the files as in the application cache, but it will not load them. I've tried an extremely simple test, checked MIME type of the manifest file, renamed the manifest file, and tried other demos. Here's an example that works fine on Chrome, but on Safari it will not load the sticky image when offline: <a href="http://htmlfive.appspot.com/static/stickies.html" target="_blank" rel="noopener noreferrer">http://htmlfive.appspot.com/static/stickies.html</a></p>
<p>This is the same problem described in <a href="https://stackoverflow.com/questions/20655771/appcache-misbehaving-in-safari-firefox" target="_blank" rel="noopener noreferrer">https://stackoverflow.com/questions/20655771/appcache-misbehaving-in-safari-firefox</a>, but I think that question doesn't make the problem as clear, and I wanted to provide a question with a concrete demo. Is there a work-around, or does Safari 7 totally not support application cache beyond the primary html file? Thanks!</p>


I&#39;m trying to use Android Studio, and the first time I boot it up, it takes like 45 MINUTES to compile... If I don&#39;t quit the application, it is okay - each subsequent compilation/running the app will take around 45 seconds.

I&#39;ve tried to check some of my caches: there&#39;s a `.gradle/caches` folder in my home directory, and it&#39;s contains 123 MB.

There&#39;s also a `.gradle` folder in my project folder... one of the `taskArtifacts` was like 200 MB. I&#39;m scared to just randomly nuke them both. What parts of the folders are safe to delete?

Is there a better explanation for why my Android Studio is taking forever to run the `gradle assemble` task upon first time loading the application?

Do I also have to clear the intellij cache too?

How to clear gradle cache?

I&#39;m trying to use Retrofit &amp; OKHttp to cache HTTP responses. I followed [this gist][1] and, ended up with this code:


&lt;!-- language: lang-java --&gt;

    File httpCacheDirectory = new File(context.getCacheDir(), &quot;responses&quot;);

    HttpResponseCache httpResponseCache = null;
    try {
         httpResponseCache = new HttpResponseCache(httpCacheDirectory, 10 * 1024 * 1024);
    } catch (IOException e) {
         Log.e(&quot;Retrofit&quot;, &quot;Could not create http cache&quot;, e);
    }

    OkHttpClient okHttpClient = new OkHttpClient();
    okHttpClient.setResponseCache(httpResponseCache);

    api = new RestAdapter.Builder()
              .setEndpoint(API_URL)
              .setLogLevel(RestAdapter.LogLevel.FULL)
              .setClient(new OkClient(okHttpClient))
              .build()
              .create(MyApi.class);


And this is MyApi with the Cache-Control headers
&lt;!-- language: lang-java --&gt;

    public interface MyApi {
       @Headers(&quot;Cache-Control: public, max-age=640000, s-maxage=640000 , max-stale=2419200&quot;)
       @GET(&quot;/api/v1/person/1/&quot;)
       void requestPerson(
               Callback&lt;Person&gt; callback
       );

First I request online and check the cache files. The correct JSON response and headers are there. But when I try to request offline, I always get `RetrofitError UnknownHostException`. Is there anything else I should do to make Retrofit read the response from cache?

**EDIT:**
Since OKHttp 2.0.x `HttpResponseCache` is `Cache`, `setResponseCache` is `setCache`

  [1]: https://gist.github.com/swankjesse/5889518 &quot;gist&quot;

Can Retrofit with OKHttp use cache data when offline

Redis can do everything that Memcached provides (LRU cache, item expiry, and now clustering in version 3.x+, currently in beta) or by tools like twemproxy. The performance is similar too. Morever, Redis adds persistence due to which you need not do cache warming in case of a server restart.

Reference to some old answers which compare Redis and Memcache, some of which favor Redis as replacement of Memcache (if already present in the stack):

* https://stackoverflow.com/questions/10558465/memcache-vs-redis

* https://stackoverflow.com/questions/2873249/is-memcached-a-dinosaur-in-comparison-to-redis

* https://stackoverflow.com/questions/4188620/redis-and-memcache-or-just-redis

In spite of this, on studying stacks of large web scale companies like Instagram, Pinterest, Twitter etc, I found that they use both Memcached and Redis for different purposes, not using Redis for primary caching. The primary cache is still Memcached, and Redis is used for its data structures based logical caching.

As of 2014, why is memcached still worth the pain to be added as additional component into your stack, when you already have a Redis component which can do everything that memcached can? What are the favorable points that incline the architects/engineers to still include memcached apart from already existing Redis?

# Update : 
For our platforms, we have completely discarded Memcached, and use redis for plain as well as logical caching requirements. Highly
performant, flexible and reliable.

Some example scenarios:

 - Listing all cached keys by a specific pattern, and read or delete their values. Very easy in redis, not doable ( easily ) in memcached.
 - Storing a payload more than 1mb, easy to do in redis, requires slab size tweaks in memcached, which has performance side effects of its own.
 - Easy snapshots of current cache content
 - Redis cluster is production ready as well along with language drivers,hence clustered deployment is easy too.



If redis is already a part of the stack, why is Memcached still used alongside Redis?

I am using Picasso to display image in my android app:

    /**
    * load image.This is within a activity so this context is activity
    */
    public void loadImage (){
        Picasso picasso = Picasso.with(this); 
    	picasso.setDebugging(true);
    	picasso.load(quiz.getImageUrl()).into(quizImage);
    }

I have enable debugging and it always shows either red and green .But never shows yellow

Now if i load same image next time and internet is not available the image is not loaded.

Questions:

1. Does it not have local disk cache?
2. How do i enable disk caching as i will be using same image multiple times.
3. Do i need to add some disk permission to android manifest file?

How do I use disk caching in Picasso?

Consider I have code like the following:

    class Foo {

       Y func(X x) {...} 

       void doSomethingWithAFunc(Function&lt;X,Y&gt; f){...}

       void hotFunction(){
            doSomethingWithAFunc(this::func);
       }

    }


Suppose that `hotFunction` is called very often. Would it then be advisable to cache `this::func`, maybe like this:

    class Foo {
         Function&lt;X,Y&gt; f = this::func;
         ...
         void hotFunction(){
            doSomethingWithAFunc(f);
         }
    }

As far as my understanding of java method references goes, the Virtual Machine creates an object of an anonymous class when a method reference is used. Thus, caching the reference would create that object only once while the first approach creates it on each function call. Is this correct?

Should method references that appear at hot positions in the code be cached or is the VM able to optimize this and make the caching superfluous? Is there a general best practice about this or is this highly VM-implemenation specific whether such caching is of any use?

Is method reference caching a good idea in Java 8?

So Safari offers *Scan Credit Card* feature on iOS8 with some credit card forms.

**My question is, how does Safari determine when to offer this option?**

So far I found that this option is available on Amazon and PayPal, but none of my credit card input forms were able to reproduce this behaviour.


![Scan credit card option activation on a form][1]


  [1]: http://i.stack.imgur.com/mjc7b.jpg

When is the Scan Credit Card option available on iOS8 Safari?

I am currently opening the link in my app in a `WebView`, but I&#39;m looking for an option to open the link in **Safari** instead.

Swift Open Link in Safari

I can&#39;t seem to find a way to view the raw HTTP requests sent by safari to the webserver. Does anyone know how you can do this in Safari 8.

I did manage to find some HTTP headers in the resource tab of the web inspector ![enter image description here][1] But I want to see the raw (in plain text) HTTP request

Thanks in advance

  [1]: http://i.stack.imgur.com/swrFN.png

How to inspect HTTP requests in Safari 8 or later

In IOS8 Safari there is a new bug with position fixed.

If you focus a textarea that is in a fixed panel, safari will scroll you to the bottom of the page. 

This makes all sorts of UIs impossible to work with, since you have no way of entering text into textareas without scrolling your page all the way down and losing your place. 

Is there any way to workaround this bug cleanly? 

&lt;!-- language: lang-css --&gt;

    #a {
      height: 10000px;
      background: linear-gradient(red, blue);
    }
    #b {
      position: fixed;
      bottom: 20px;
      left: 10%;
      width: 100%;
      height: 300px;
    }

    textarea {
       width: 80%;
       height: 300px;
    }

&lt;!-- language: lang-html --&gt;

    &lt;html&gt;
       &lt;body&gt;
       &lt;div id=&quot;a&quot;&gt;&lt;/div&gt;
       &lt;div id=&quot;b&quot;&gt;&lt;textarea&gt;&lt;/textarea&gt;&lt;/div&gt;
       &lt;/body&gt;
    &lt;/html&gt;

Safari in ios8 is scrolling screen when fixed elements get focus

I&#39;ve **Safari 8.0.6** with **iOS 8.3** on my iPad, while debugging through Web Inspector on my **Mac (10.10.3)**, the connection keeps on disconnecting (I don&#39;t see the device name under Develop menu upon disconnection) but can resume if I quit safari followed by a relaunch then I&#39;m able to refresh and inspect remotely again. 

Content Type	Original Author	Original Content on Stackoverflow
Question	Guy Goldstein	View Question on Stackoverflow
Solution 1 - Caching	chandana	View Answer on Stackoverflow

Safari 7 application cache does not work

Caching Problem Overview

Caching Solutions

Solution 1 - Caching

Getting the remaining arguments in argparse

JavaScript design pattern: difference between module pattern and revealing module pattern?

Attributions