Tutorial by Examples: t

Date date = new Date(); df = new SimpleDateFormat("HH:mm", Locale.US); String localizedDate = df.format(date) Commonly used patterns: HH: hour (0-23) hh: hour (1-12) a: AM/PM marker mm: minute (0-59) ss: second dd: day in month (1-31) MM: month yyyy: year

Based on this blog post. Assume you have a method like this: def get[T]: Option[T] = ??? When you try to call it without specifying the generic parameter, Nothing gets inferred, which is not very useful for an actual implementation (and its result is not useful). With the following solution t...

Grunt is a JavaScript Task Runner, used for automation of repetitive tasks like minification, compilation, unit testing, linting, etc. In order to get started, you'll want to install Grunt's command line interface (CLI) globally. npm install -g grunt-cli Preparing a new Grunt project: A typica...

Guice is the default dependency injection (further DI) framework of Play. Other frameworks may be used as well, but using Guice makes development efforts easier, since Play takes care for things under the veil. Injection of Play API-s Starting from Play 2.5 several API-s, which were static in the ...

Thread Pools are used mostly calling methods in ExecutorService. The following methods can be used to submit work for execution: MethodDescriptionsubmitExecutes a the submitted work and return a future which can be used to get the resultexecuteExecute the task sometime in the future without gettin...

Premise These instruction shows a procedure to install native OCaml binaries in Windows. If your operative system is Windows 10 (Insider Preview) build 14316 or later you can also install OCaml through Bash on Ubuntu on Windows. In this case, follow the instruction to install OCaml on Ubuntu. Inst...

These are general tips that in general improve performance. If your code is slow, it is always important to profile it to figure out what parts are slow. Guessing is never enough. Improving the execution speed of something that only takes up 1% of the execution time probably isn't worth the effort. ...

CountDownTimer is useful for repeatedly performing an action in a steady interval for a set duration. In this example, we will update a text view every second for 30 seconds telling how much time is remaining. Then when the timer finishes, we will set the TextView to say "Done." TextView ...

FlowRouter is more modular compared to Iron Router. Install FlowRouter meteor add kadira:flow-router Rendering a template In particular, you must manually add a layout rendering package to link with your rendering engine: Blaze Layout for Blaze: meteor add kadira:blaze-layout React Layout ...

CL-USER> (maplist (lambda (list) (cons 0 list)) '(1 2 3 4)) ((0 1 2 3 4) (0 2 3 4) (0 3 4) (0 4)) CL-USER> (maplist #'append '(a b c d -) '(1 2 3)) ((A B C D - 1 2 3) (B C D - 2 3) (C D - 3))

After installing gnuplot it's a good idea to run a simple example to ensure all is working fine. Open your terminal Type gnuplot. Your prompt should now change to gnuplot> Type: plot sin(x) If all is well you should see now a sin(x) graphic generated by gnuplot. Note: if you are on Wind...

The per-directory context is a part of the static configuration file between <Directory> and </Directory> tags. The entire content of dynamic configuration files is within the per-directory context of the folder in which the .htaccess resides. RewriteRule's in per-directory context matc...

The virtual host context is a part of the static configuration file between <VirtualHost> and </VirtualHost> tags. RewriteRule's in virtual host context match against the part of an url after the protocol, hostname and port, and before the query string. When the following rule is used ...

As mentioned in "Remarks", a partition is a part/slice/chunk of an RDD. Below is a minimal example on how to request a minimum number of partitions for your RDD: In [1]: mylistRDD = sc.parallelize([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 2) In [2]: mylistRDD.getNumPartitions() Out[2]: 2 No...

Sometimes we want to repartition an RDD, for example because it comes from a file that wasn't created by us, and the number of partitions defined from the creator is not the one we want. The two most known functions to achieve this are: repartition(numPartitions) and: coalesce(numPartitions, s...

As rule of thumb, one would want his RDD to have as many partitions as the product of the number of executors by the number of used cores by 3 (or maybe 4). Of course, that's a heuristic and it really depends on your application, dataset and cluster configuration. Example: In [1]: data = sc.textF...

private static final String TAG = "IntentBitmapFetch"; private static final String COLON_SEPARATOR = ":"; private static final String IMAGE = "image"; @Nullable public Bitmap getBitmap(@NonNull Uri bitmapUri, int maxDimen) { InputStream is = context.getConten...

Let's make a hello world web script. Web scripts have a descriptor, a controller, and, optionally, a view. These files must follow a naming convention. This descriptor is named helloworld.get.desc.xml. <webscript> <shortname>Hello World</shortname> <description>Hello ...

The Hello World Web Script handles GET HTTP methods. But what if you want to create data on the server? For that your web script should handle POST. Here is a simple example that creates new folders in Company Home. It is invoked by making a POST call with a JSON body that looks like: {'name':'tes...

A single instance of Node.js runs in a single thread. To take advantage of multi-core systems, application can be launched in a cluster of Node.js processes to handle the load. The cluster module allows you to easily create child processes that all share server ports. Following example create the ...