iOS - Confused about when to use Core Data in my app
ios,database,swift,caching,core-data
Actually, for your scenario I would say that you don't need any persistence in your app, but rather fetch your data from the server every time the app starts and just keep it in memory. There are a lot of apps which are doing it this way and this is...
CSS changes not updating on site
css,symfony2,caching,vagrant,assetic
I think this issue of caching files and replacing them with the unicode 'REPLACEMENT CHARACTER' (�) has to do with sendfile. Turn sendfile/EnableSendfile off in nginx/apache. Related question is here: yeoman and angular utf8 issue and caching...
How can I cache my website in the user's browser?
Reconsider using AppCache. Using it doesn't necessarily imply that your site will work offline. Basically, here are the steps that AppCache takes, regardless of the browser connection status: Asks the server for the manifest file. If the manifest file hasn't changed, it serves the local files. If the manifest file...
PFQuery cache is null all the time
ios,objective-c,caching,parse.com,pfquery
In order to have a cached result, the query needs to match (or be equal to) an earlier query where the result was cached. The query posted in the question is different every time, because it is qualified by [NSDate date]. To be sure a query has a cached result,...
yii2 disable page cache on post request
php,caching,yii2,yii2-advanced-app
Since enabled is a boolean just pass the isGet variable from \yii\web\Request: 'pageCache' => [ ... 'enabled' => Yii::$app->request->isGet ] The Request class represents an HTTP request. Read more on it from the API page...
Making some, but not all, (CUDA) memory accesses uncached
Only if you compile that kernel individually, because this is an instruction level feature which is enabled by code generation. You could also use inline PTX assembler to issue ld.global.cg instructions for a particular load operation within a kernel [see here for details]. No, it is an instruction level...
UIWebView Copy Cache Data For Offline View
ios,objective-c,caching,uiwebview
You may used ASIWebPageRequest , example given here Or If reachability got connectivity NSCachedURLResponse* response = [[NSURLCache sharedURLCache] cachedResponseForRequest:[webView request]]; NSData* data = [response data]; Store data in locally and use it whenever you got reachability offline....
android - best way to load multiple images locally
Most image loading libraries support multiple sources, not just http. Both Glide and Picasso allow you to load images from file paths, content Uris, resources, assets, and more. See Glide's RequestManager class for all of the available types Glide currently supports. Don't re-invent the wheel, use a library....
“client not initialized” error when using SSMCache with AWS elasticache autodiscovery
caching,amazon-web-services,amazon-elasticache,spring-cache
Show your configuration and usage. It seams that you haven't defined defaultCache or used Cacheable without 'value' param set....
NSURLRequest has serious problems in iOS
Answering my own question: Resetting the NSURLSession seems to work, I did that along with having a request with a ReloadIgnoringLocalAndRemoteCacheData policy, I don't know if it will work without that, but in this combination they seem to work. I have reseted the URLSession with this code: with a ReloadIgnoringLocalAndRemoteCacheData...
Why the CPU compiles the GPU shader?
caching,compilation,shader,gpu,cpu
Not all GPUs use the same instruction set. Having only the binary on disk means that the sets of GPU architectures that can be used with that software will be fixed forever.
What is the difference between memory_only and memory_and_disk caching level in spark?
Documentation says --- Storage Level Meaning MEMORY_ONLY Store RDD as deserialized Java objects in the JVM. If the RDD does not fit in memory, some partitions will not be cached and will be recomputed on the fly each time they're needed. This is the default level. MEMORY_AND_DISK Store RDD as...
Detemine memory used by Hazelcast cache
Either you buy the Hazelcast Managementcenter or you can gather the information using JMX and aggregate them on your own. Please find the JMX documentation here: http://docs.hazelcast.org/docs/3.5/manual/html-single/hazelcast-documentation.html#jmx-api-per-node
Caching in ASP.NET MVC with uncachable forms
asp.net,asp.net-mvc,caching,donut-caching,child-actions
Found a way. Not sure if it's optimal, but it works. Instead of making the form the "donut hole", I make the anti forgery token itself the donut hole. [ChildActionOnly] public virtual ContentResult GetAntiForgeryToken() { using (var viewPage = new ViewPage()) { var htmlHelper = new HtmlHelper(new ViewContext(), viewPage); var...
Fetching cached image not working
ios,objective-c,uitableview,caching,image-caching
The problem is in the writeImage:ToPlistFileForKey: method. You convert an image to a data as below: NSData *data = [NSKeyedArchiver archivedDataWithRootObject:image]; But convert the data to image like this: UIImage * image = [UIImage imageWithData:data]; This will always return a nil that because the format of the archived data is...
AngularJS browser cache issues
A simple solution would be to add query strings representing timestamp or session id to your files. For e.g., in our spring applications, we simply use : <script src="js/angular/lib/app.js?r=<%= session.getId()%>"></script> You can implement the same solution in your server specific implementation too....
Generic Object Cache
Since you estimate a lot of items in the cache and the operations on the cache will be type specific, you could use multiple bags wrapped into a dictionary. That would speed up finding the subset of the cache of type of interest and would be ideal if the cache...
Website html doesnt update for users because of cache
What are the resources that are being cached? I suspect js/css files, a good way to handle this is to add a query param with a version to the path of those resources in order to force the browser to load the new file if the version changed, something like...
How to use a dynamic value for cache key with ActiveModel::Serializers (v0.10.0.rc1)
caching,active-model-serializers,rails-api
I posted an issue on the AMS github page and went back and forth with @joaomdmoura and @groyoh until we came up with this temporary solution. It works on my end and it'll do for now until AMS makes an official decision on the best solution. module ActiveModel class Serializer...
Hibernate Query cache invalidation
java,hibernate,jpa,caching,concurrency
The query cache is not useful for write-mostly applications, as you probably figured out yourself. There is no write-through query caching option, so you need to question why you are using this feature in the first place. The entity caching is useful when you plan on changing those entities you’re...
ASP NET MVC OutputCache VaryByParam complex objects
c#,asp.net-mvc,caching,outputcache
The VaryByParam value from MSDN: A semicolon-separated list of strings that correspond to query-string values for the GET method, or to parameter values for the POST method. If you want to vary the output cache by all parameter values, set the attribute to an asterisk (*). An alternative approach is...
Spark Partition Benchmark
I found a solution for me now: I wrote a separate class which calls the spark-submit command on a new process. This can be done in a loop, so every benchmark is started in a new thread and sparkContext is also separated per process. So garbage collection is done and...
Niginx location with cache for a specific url with params
Simply use proxy_no_cache and proxy_cache_bypass instead of if, testing the value of $arg_geoloc (not $args_geoloc) with map directive. map $arg_geoloc $bypass { default 1; 1 0; } server { ... location /ajax/airport.php { ... proxy_no_cache $bypass; proxy_cache_bypass $bypass; ... # No need to add /ajax/airport.php in proxy_pass proxy_pass http://127.0.0.1:8080; }...
ServiceWorker: when are the files actually cached?
When you register for a SW you'll get a registration once the SW parses and starts installing. You can track its progress using the statechange event: navigator.serviceWorker.register('/sw.js').then(function(reg) { if (!reg.installing) return; console.log("There is a ServiceWorker installing"); var worker = reg.installing; worker.addEventListener('statechange', function() { if (worker.state == 'redundant') { console.log('Install failed');...
Is using own int capacity faster than using .length field of an array?
java,performance,caching,concurrency
When you access array normally, JVM uses its length anyway to perform bounds check. But when you access array via sun.misc.Unsafe (like Martin does), you don't have to pay this implicit penalty. Array's length field usually lies in the same cache line as its first elements, so you will have...
Does FileDescriptor.sync() work for all file data or just file data originating within the callers JVM
java,caching,sync,flush,file-descriptor
Does FileDescriptor.sync() work for all file data No. or just file data originating within the callers JVM It works on the current file descriptor only, which is necessarily within the caller's JVM, along with the data he is writing....
Elastic Beanstalk Prevent Files Overwriting
wordpress,git,caching,amazon-web-services
First of all you are using a very old version of the EB CLI. But that’s irrelevant to your problem/question. how do you only version certain folders with beanstalk is this even possible? No, this is not possible. Let me explain what beanstalk is doing. Elastic Beanstalk stores your files...
EaselJS cache Text object
caching,rendering,easeljs,createjs
Caching is relative to the object, so if you move the object on the x/y, you don't have to update the cache. Additionally, when you adjust the alignment, the bounds will have an x and y property, which will be the offset of the top left from the registration point....
How to control implicit caching of RDDs by Spark?
caching,apache-spark,persist,rdd
There are a few things happening here. First, you are in fact not caching the RDD. From your Github link: # Now persist the intermediate result sc.parallelize(xrange(1, n + 1), partitions).map(f).persist() This creates a new RDD, does a map, then persists the resulting RDD. You don't keep a reference to...
With the MESI protocol, a write hit also stalls the processor, right?
caching,architecture,multiprocessing,vhdl,mesi
Do not confuse latency with throughput. Invalidation messages will take multiple cycles to complete but you can pipeline the process. It is possible to built a pipelined cache, that is able to start the processing of new invalidation messages before the previous ones have been completed. The MESI protocol does...
How to Cache a .htaccess & .htpasswd/Authorization Required Offline
html,.htaccess,caching,basic-authentication,.htpasswd
.htaccess files are not available offline, because the server (Apache) uses them, not the browser. This is an important point which I think you did not understand yet. The server looks into the file and uses it to offer login, the login itself does not happen in the .htaccess file....
Routes in laravel5 don't work correctly
I assume you have another route of subastas/creado for the GET request to display the form. In your Form::open() you're using that to generate the URL, laravel is seeing that as a GET route as thats the first one registered in your routes.php and changing the form method to GET...
scalacache memoization asynchronous refresh
Expiration and refresh are closely related but different mechanisms. An expired entry is considered stale and cannot be used, so it must be discarded and refetched. An entry eligible for being refreshed means that the content is still valid to use, but the data should be refetched as it may...
Does setting beresp.ttl to 0s replace previous cache?
Well, I've just did some tests and Varnish does not replace the object cached.
How to find systems cached and free memory using C#
Add Microsoft.VisualBasic.Devices assembly reference to your project then you can use following var Available = new ComputerInfo().AvailablePhysicalMemory; var Total = new ComputerInfo().TotalPhysicalMemory; var Cheched = Total - Available; Edit: Following code works for me, also note that Available amount includes the Free Amount and also includes most of the Cached...
How to use angular cache to store on page refresh?
angularjs,caching,angular-cache
Answer with the help of Shehryar's comment. See: codepen // To add to local storage localStorageService.set('localStorageKey','Now this!'); // Read that value back $scope.value = localStorageService.get('localStorageKey'); Using the angular local storage module, this example will store the cache create after a page refresh. It is also possible to add in localStorageService.clearAll();...
How to setup static assets caching with apache?
There are a number of techniques, some better than others. One good one is to have the following configuration: <IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.+)\.(\d+)\.(bmp|css|cur|gif|ico|jpe?g|js|png|svgz?|webp|webmanifest)$ $1.$3 [L] </IfModule> This allows URLs of the form /i/filename.1433499948.gif - but the file that is actually read from disk is just...
Prevent Caching of PDFs in ASP Classic
The code below generates a link with the current time converted to a Double so it produces a random link each time the page is loaded to trick the browser into thinking it is a new pdf. <a href="yourpdffile.pdf?<%= CStr(CDbl(Now)) %>">Link to the PDF</a> Now is the current time CDbl(Now)...
Cache expires although explicitly set not to expire
Chances are if you are leaving it for some time then your app domain is shutting down due to lack of use and if that goes so does its in memory cache. ASP.NET Data Cache - preserve contents after app domain restart discusses this issue and some possible solutions to...
AFNetworking 2.0 Cache Issue
ios,objective-c,caching,afnetworking
NSURLRequestReloadIgnoringLocalCacheData is a cache policy that forces the data to be loaded from the original source, so locally cached data will not be used. Use: NSURLRequestUseProtocolCachePolicy for default behavior NSURLRequestReturnCacheDataElseLoad for loading from cache, and loading from the original source if it does not exist in the cache. NSURLRequestReturnCacheDataDontLoad for...
iOS - Saving logged in user info
Use NSKeyedArchiver. Then you will have a Data Model class and can access the items directly via properties instead by a String name, the compiler will help ensure there are no typos.
Can the HTTP method “PATCH” be safely used across proxies etc.?
http,caching,filter,proxy,http-patch
The answer to this question is a moving target. As time progresses and PATCH either becomes more or less popular, the systems in the network may or may not support it. Generally only the network entities that will care about HTTP verbs will be OSI Level 3 (IP) and up...
Unzipping Multiple Files - Java
I use this function for unzip a file: private void unzip(String zipFile) throws Exception { int BUFFER = 2048; File file = new File(zipFile); @SuppressWarnings("resource") ZipFile zip = new ZipFile(file); String newPath = zipFile.substring(0, zipFile.length() - 4); new File(newPath).mkdir(); @SuppressWarnings("rawtypes") Enumeration zipFileEntries = zip.entries(); while (zipFileEntries.hasMoreElements()) { ZipEntry entry =...
Is processor cache flushed during context switch in multicore?
caching,multicore,volatile,flush,context-switch
Whenever there is any sort of context switch the OS will save its state such that it can be restarted again on any core (assuming it has not been tied to a specific core using a processor affinity function). Saving a state that for some reason or other is incomplete...
Codeigniter object cache doesnt work
codeigniter,caching,codeigniter-2
Pretty simple, chmod 777 -R cache/ did the trick.
OpenLayers 3 - retina vs cached tiles
caching,openlayers-3,geoserver,retina
Okay, it looks like it's really easy to solve: you have only have to set 'hidpi' option to false on the source.
Are CDNs that don't cache useful?
Yes, it can be useful by moving the content closer to the user. Most CDN's will serve your static file from a geographical location as close to the user as possible, typically providing better latency. Of course, you need to have users across the globe for this to make sense...
Why does the expiration date of the request cache lie in the past?
If the Expires header is set to 0, the browser interprets it as 1 January 1970, which relates to the Unix time aka POSIX time. Because this date lies in the past, this means that the request is not cached. The Expires header is defined within RFC 7234, which includes...
PHP How to not cache generated HTML but cache static data like images/js/css
javascript,php,css,image,caching
you can use a htaccess to define files that you want to be cached all you want is to make a .htaccess file in the main directory of your website and add this code example: # cache images/pdf docs for 1 week <FilesMatch "\.(ico|pdf|jpg|jpeg|png|gif)$"> Header set Cache-Control "max-age=604800, public, must-revalidate"...
django tastypie caching is not working for list data
django,python-2.7,caching,tastypie
The problem is with your server configuration I guess. Please edit your server configuration file as given below (if it is nginx) vi /etc/nginx/sites-enabled/your-site-name and add the following line of code in the file location / { proxy_pass http://127.0.0.1:8000; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_cache cache;...
How many bits are in the address field for a directly mapped cache?
caching,system,cpu,computer-architecture,cpu-cache
After watching this Caching Video, I was able to figure this out. (Highly recommend this video) Please correct me if any of this is wrong In total the address has 64 bits. Now for the different components of the cache address Byte - There are 64 bytes in a byte...
How to disable cache for a image carousel in TYPO3
caching,typo3,typoscript,extbase,typo3-6.2.x
in your ext_localconf.php there, where you added your plugin make an usage of the 4-th param of configurePlugin method \TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin( 'Vendor.' . $_EXTKEY, 'PluginName', array('Customers' => 'slider',), array('Customers' => 'slider',) // List non-cachable action(s) ); Of course fix the VendorName and PluginName to your own. It will cause that plugin's...
Caching issue in angularJS application
angularjs,caching,orm,eloquent,slim
Unless you state it, angular will not cache your $http requests, so most likely the values are being cached by your server. There are a couple of things you can do: Pass a header to the server to ignore the cache (assuming your server will react to that header appropriately)...
How to omit creating static Map for data caching?
You can use Google guava for this type of caching: Cache<String, List<String>> cachedXpaths = CacheBuilder.newBuilder() .expireAfterWrite(3, TimeUnit.MINUTES) .maximumSize(1000) .concurrencyLevel(5) .weakKeys() .build( new CacheLoader<String, List<String>>() { // Call load method when there is a new key public List<String> load(String key) throws Exception { // Sample custom method to add a new...
Which db technology can I use for caching?
I got a great tool for this : Oracle Berkeley DB, specialized in embedded databases. Other ones are available here: http://en.wikipedia.org/wiki/Embedded_database...
Angular - Directive with dynamic template
javascript,html,angularjs,caching,angularjs-directive
After a long run I found the solution, the problem was: replace:true, After I removed this part the problem was solved....
Cache and scratchpad memories
caching,arm,computer-architecture
A scratchpad is just that a place to keep some stuff. Cache, is memory you talk through normally not talk at. Scratchpad is like a post it note, something you write something on and keep with you. Cache is paper you send off to someone else with instructions like a...
Caching Views in XAML changes appearance?
xaml,caching,windows-store-apps
Does this make sense / improve performance of loading controls? Yes, it does make sense, however there are a few things to consider with this. Probably the most important thing is memory management. You need to consider how much memory you will be using when caching your views. Picture...
What does `expires -1` mean in NGINX `location` directive?
If expires -1 is used, it means that these pages are never cached. The expire directive instructs the browser to expire file cache after a certain amount of time (or at a certain time). If a negative value is given, there is no caching.
Cache ruining Jquery Code?
It could be your images aren't loaded by the time your code runs. Try putting your code in a window.load function and see if that works. $(window).load(function() { $('.artobject').css('margin-bottom',$('.img-wrap').height()); }); </script> Updated after Terry reminded me it wasn't document.ready....
Yii2 : how to cache active data provider?
It has little use caching the data provider after instantiating, since it's not actually doing any selecting on the database until it has been prepared. So you would actually be caching an empty object instance like it is now. If you have a very large set of records, call the...
Angular ng-repeat cache (avoid re-rendering on state change)
javascript,angularjs,performance,caching,angularjs-ng-repeat
Well if you disable the scope of the scope that the ng-repeat is on. Then it will no longer render. It essentially becomes static content. This allows you to actually control when it is rendered. ux-datagrid actually uses this concept to turn off dom that is out of view so...
Cache “dictionary-like” DB entities in ASP.NET MVC app
c#,asp.net-mvc,azure,caching,sql-azure
Have a look at System.Web.Caching.Cache. It provides a good caching framework, and allows for a variety of cache expiration policies. You control caching with a CacheDependency, which can be as simple as a time duration until the cache must be refreshed, or as complex as a SqlCacheDependency that automatically refreshes...
downloading the last 48 hours of facebook news feed
That's impossible. Data changes every second, and the connections of objects (comments, likes) would be late on your files. Also, that information is not yours, and is not correct to "download" it. I think you should make a video, maybe thats the best solluction for remembering this date on the...
Low level caching for collection
So should I use a cached_books method in the controller like this: Yes, you can. Although there's some gotchas you have to be aware of. Book is ActiveRecord. When you call Book.something (e.g. Book.all, or just even Book.order(:title) it returns you a ActiveRecord::Relation, which is basically wrapper for array...
Android picasso cache images
Picasso automatically caches the loaded images, So that next time they will be loaded from the cache. You can check whether the image is loaded from the web, cache or disk by enabling the indicator setIndicatorsEnabled(true) Indicators will be shown for each image, specifying where the image is loaded from....
Azure Managed Cache without webconfig
code to programmatically talk to managed cache: var cacheSvcUri = "<your-cache-name>.cache.windows.net"; // Setup DataCacheSecurity configuration string cacheSvcAcsKey = "<your-acs-key>"; var secureAcsKey = new SecureString(); foreach (char c in cacheSvcAcsKey) { secureAcsKey.AppendChar(c); } secureAcsKey.MakeReadOnly(); // Setup the DataCacheFactory configuration DataCacheFactoryConfiguration dcfConfig = new DataCacheFactoryConfiguration(); // Set autodiscover for in-role dcfConfig.AutoDiscoverProperty =...
Caching with Webpack, [hash] value inside index source code, using React.js
node.js,caching,reactjs,webpack,isomorphic-javascript
The ExtendedAPIPlugin adds a __webpack_hash__ variable to your bundle, which might be what you're looking for.
Understanding Memory Replays and In-Flight Requests
Effective load throughput is not the only metric that determines the performance of your kernel! A kernel with perfectly coalesced loads will always have a lower effective load throughput than the equivalent, non coalesced kernel, but that alone says nothing about its execution time: in the end, the one metric...
Avoid Cache misses in Java
In C++ im using stack allocation where i can,also i'm holding data with this same purpose in one array(Data Driven Programming) etc... In Java it will automatically place short live obejcts on the stack using Escape Analysis. I wouldn't worry about this unless you see in a profiler that...
App Not Downloading Newest Version Of File [Java]
Use URLConnection.setUseCaches(boolean);. In your case, it would be connection.setUseCaches(false);...
How to cache Exchange web service API autodiscoverurl?
c#,asp.net,caching,exchangewebservices
I would suggest you cache the minimum information your app needs to function. This page suggests Autodiscover endpoint EWS URL and any other settings retrieved from the Autodiscover response ...
Am I right volatile keyword in C needs special hardware support to work?
volatile forbids the compiler to optimize-out accesses to such variables or re-order such accesses with regard to all volatile variables (only!). Actual semantics might be implementation defined (but have to be specified by the compiler). For the hardware: yes, caches and bus-buffers (e.g. "write buffers") may still reorder, not to...
Mongodb - make inmemory or use cache
performance,mongodb,caching,memory
MongoDB default storage engine maps the files in memory. It provides an efficient way to access the data, while avoiding double caching (i.e. MongoDB cache is actually the page cache of the OS). Does this mean as long as my data is smaller than the available ram it will be...
immutant failing to add a cache to a web cache container
caching,clojure,wildfly,immutant
This was being caused by an error with our deployment scripts. A hack had been done to deploy the same .war twice for an application requirement. The hack stopped the application from shutting down cleanly when a redeployment happened, and was causing the issue with the cache.
Cache inconsistency - Entity not always persisted in cached Collection
java,hibernate,jpa,caching,ehcache
The Hibernate Collection Cache always invalidates existing entries and both the Entity and the Collection caches are sharing the same AbstractReadWriteEhcacheAccessStrategy, so a soft-lock is acquired when updating data. Because you are using a unidirectional one-to-many association, you will end up with a Validation table and a Step_validation link table...
Swift clearing JSON cache?
Instead of creating your request with, NSURLRequest(URL: formulaAPI!) you should use the following method so that you can explicitly set the cache policy. var request = NSURLRequest(URL: formulaAPI!, cachePolicy: .ReloadIgnoringLocalCacheData, timeoutInterval: 30) NSURLRequest(URL:) uses the default came policy, NSURLRequestUseProtocolCachePolicy, and a time out interval of 60 seconds....
The process cannot access the file because it is being used by another process asp.net [duplicate]
c#,asp.net,asp.net-mvc,caching,system.io.file
Dispose image after you're done with resize to use it again.
How to divide the L2 cache between the cores on a ARM Cortex-A7?
caching,linux-kernel,arm,cortex-a,l2-cache
Two pieces of code that don't use the same physical memory will not cause any cache conflicts, as cache is physically tagged on A7 processors (any ARM processor with virtualization extensions). On A7, cache lines are also VM id tagged. So if you want to enforce separation between codes running...
Symfony 2 Different behaviors between prod and dev environments
Full answer was to execute : app/console doctrine:cache:clear-metadata --env=prod The caching was caused by a memcache configuration only present in production environment....
Ajax request if no cache is available
javascript,jquery,ajax,caching
Your response of request will not be cached when Your url is unique for browser. It's well know practice use it like "your.domain.com/some/uri?{timestamp}". Try this: var globalList; function initStuff() { globalList = JSON.parse(sessionStorage.getItem('globalList')); // if no cached variable is available, get it via ajax request if (!globalList) { $.getJSON('jsonGetStuff.htm?' +...
Grunt filerev, usemin and file caching
angularjs,caching,gruntjs,grunt-usemin
Found this issue discussed at three different places. The third link is closest to the solution. I finally ended up using vermin as a replacement task for filerev and usemin which internally executes both the tasks repeatedly until the filenames stop changing. It is shared as a gist here: https://gist.github.com/markrian/aa185c5ec66232a38a68...
Django localmem size
The default cache size is 300, according to the code. Your snippet won't tell you anything useful about the size of the cache. When the locmem cache is full, a subsequent set will cause it to evict items based solely on the modulus of their key's position in the dict,...
Does Python have a default Caching service
python,python-2.7,python-3.x,caching,local-storage
Depends on what you need to do. If you give a function a default argument that equates to a list or dictionary and never give it an argument for that default, the function parameter could act as a cache. The reason for this is because Python evaluates its function definition...
Django cache, weather site auto-refresh cache every 5 minutes
python,django,caching,memcached
You could try to use queryset caching similar to what johnny-cache does and expire the querysets once new data comes in rather than every n minutes.
How to implement immutable cache in Scala?
scala,caching,concurrency,future
If you want to use only things within scala collections, scala.collection.concurrent.TrieMap is a decent choice. However, please be aware that TrieMap#getOrElseUpdate had a thread safety bug that was only fixed recently in 2.11.6. If you can afford the additional dependency, guava cache is quite good for writing such caches. Especially...
php - mysql storing old data
in flash i would have a 'long' magicnumber that would increment perpetually. then subsequent calls to the url would increment the magicnumber and add it to the url. such as url="http://example.com?property=948&angle=street-corner&magicnumber=837493"...
Google Volley Imageloader - Uncache a 302 redirect request or intercepting the redirect url
android,redirect,caching,android-volley,http-status-code-302
The imageloader provided from android volley uses a cachekey in order to cache requests, but during its process it makes a simple image request. So just use a request: Request<Bitmap> imageRequest = new ImageRequest(requestUrl, listener, maxWidth, maxHeight, scaleType, Bitmap.Config.RGB_565, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { imageView.setImageResource(R.drawable.default_avatar); }...
How to store nil with Rails.cache.fetch & memcache?
ruby-on-rails,ruby-on-rails-3,caching,null,memcached
One solution is to use a NullObject, like this: class Specialist NullData = Struct.new(nil) def city result = Rails.cache.fetch([self.class.name, self.id, "city"], expires_in: 23.hours) do if responded? .. else NullData.new() end result.is_a?(NullData) ? nil : result end end That way you create a null object that can be cached. Then when...
Caching in Webview is not working in Android
android,caching,webview,browser-cache,offline-caching
You are not able to cache documents from docs.google.com like this. The server can send a cache-control header as response to any request to set rules for the client about caching. As these documents from docs.google.com are never static, the response contains the instruction to don't cache your document. cache-control:no-cache,...
How to pass a file as parameter in mapreduce
Yes, there is also a way in the new API. First, store the file in HDFS. Then, in the Driver class (in the main method), do the following: Configuration conf = getConf(); ... Job job = Job.getInstance(conf); ... job.addCacheFile(new Path(filename).toUri()); Finally, in the mapper class (for instance in the setup()...
How to call posts from PHP
php,wordpress,caching,cron,call
The easiest way to do it in PHP is to use file_get_contents() (fopen() also works), if the HTTP stream wrapper is enabled on your server: <?php $postUrls = array( 'http://my.site.here/post1', 'http://my.site.here/post2', 'http://my.site.here/post3', 'http://my.site.here/post4', 'http://my.site.here/post5', ); foreach ($postUrls as $url) { // Get the post as an user will do it...
Are cache-line-ping-pong and false sharing the same?
caching,multicore,computer-architecture,processor,false-sharing
Summary: False sharing and cache-line ping-ponging are related but not the same thing. False sharing can cause cache-line ping-ponging, but it is not the only possible cause since cache-line ping-ponging can also be caused by true sharing. Details: False sharing False sharing occurs when different threads have data that is...
In what use cases is locking on ASP.NET cache required/desirable
Locking is not about where in the code you use it but if more than one thread can execute that code at any one time. If there is a chance of a race condition you need to lock, even if apparently in development and your specific setup no errors emerge....
PlayFramework 2.2.6. Default cache expiration
java,caching,playframework-2.2
You have the option to specifiy an expiration for the cache - in seconds (https://www.playframework.com/documentation/2.2.x/JavaCache). If you don't do this, then the default will be 0, which means that the data is going to stay in the cache forever (for indefinite time): https://github.com/playframework/playframework/blob/2.2.x/framework/src/play-cache/src/main/scala/play/api/cache/Cache.scala#L50-L59 Of course as this is only a...
Writing a BufferedImage cache and save it to disk
java,caching,serialization,bufferedimage
The error occurs because ImageIO.read(...) doesn't read all the data that was written using ImageIO.write(...). You can write the image to the ObjectOutputStread as a byte[]. For example: private static void writeCache(ObjectOutputStream oos, HashMap<String, BufferedImage> data) throws IOException { // Number of saved elements oos.writeInt(data.size()); // Let's write (url, image)...