Tutorial by Examples: ed

.Rprofile is a file containing R code that is executed when you launch R from the directory containing the .Rprofile file. The similarly named Rprofile.site, located in R's home directory, is executed by default every time you load R from any directory. Rprofile.site and to a greater extend .Rprofil...

This example intend to be a gentle introduction to the Excel Object Model for beginners. Open the Visual Basic Editor (VBE) Click View --> Immediate Window to open the Immediate Window (or ctrl + G): You should see the following Immediate Window at the bottom on VBE: This wi...

Some times you need to debug python code which is executed by another process and and in this cases rpdb comes in handy. rpdb is a wrapper around pdb that re-routes stdin and stdout to a socket handler. By default it opens the debugger on port 4444 Usage: # In the Python file you want to debu...

FNR contains the number of the input file row being processed. In this example you will see awk starting on 1 again when starting to process the second file. Example with one file $ cat file1 AAAA BBBB CCCC $ awk '{ print FNR }' file1 1 2 3 Example with two files $ cat file1 AAAA BBBB...

If you want to create an instance of an inner nested class you need to provide a class object of the enclosing class as an extra parameter with Class#getDeclaredConstructor. public class Enclosing{ public class Nested{ public Nested(String a){ System.out.println("Constru...

If you try to submit tasks to a shutdown Executor or the queue is saturated (only possible with bounded ones) and maximum number of Threads has been reached, RejectedExecutionHandler.rejectedExecution(Runnable, ThreadPoolExecutor) will be called. The default behavior is that you'll get a Rej...

On a few occasions, I have had an interesting figure I saved but I lost an access to its data. This example shows a trick how to achieve extract information from a figure. The key functions are findobj and get. findobj returns a handler to an object given attributes or properties of the object, suc...

runOutsideAngular can be used to run code outside Angular 2 so that it does not trigger change detection unnecessarily. This can be used to for example run multiple HTTP request to get all the data before rendering it. To execute code again inside Angular 2, run method of NgZone can be used. my.com...

When applied to a property of a domain class, the database will create a NOT NULL column. using System.ComponentModel.DataAnnotations; public class Person { public int PersonID { get; set; } [Required] public string PersonName { get; set; } } The resulting column wi...

Title This band is showed once at the beginning of the report. It can be used as first page by setting the attribute isTitleNewPage="true" Page Header This appears at the beginning of each page excluding first page if Title band is used and last page if Summary band is used with setting...

JasperSoft Studio In Preview, run report by clicking green arrow, if no errors the export menu will be enable, click the export button (disk image) and select "Export As Pdf"

reduce(_:combine:) can be used in order to combine the elements of a sequence into a single value. It takes an initial value for the result, as well as a closure to apply to each element – which will return the new accumulated value. For example, we can use it to sum an array of numbers: let numbe...

For more complex applications, you'll want to build up a ``settings.json` object using multiple environment variables. if(Meteor.isServer){ Meteor.startup(function()){ // this needs to be run on the server var environment, settings; environment = process.env.METEOR_ENV || "...

Development usually begins with an editor or an Integrated Development Environment. The following IDEs are known to support Meteor to some extent: Atom - Javascript IDE that can fully leverage Meteor's isomorphic javascript framework. If you want to be able to hack on your editor itself, this i...

Developing Meteor apps usually means developing multi-client reactivity, which requires collaboration tools. The following tools have proven to be popular within the Meteor community. Google Hangouts - Video conferencing and chat. Zenhub.io - Kanban boards for GitHub. InVision - Collaborative ...

Document Object Model Start by creating your tabs and panes in your Object Model... <template name="samplePage"> <div id="samplePage" class="page"> <ul class="nav nav-tabs"> <li id="firstPanelTab"><a href=&...

RecyclerView will perform a relevant animation if any of the "notify" methods are used except for notifyDataSetChanged; this includes notifyItemChanged, notifyItemInserted, notifyItemMoved, notifyItemRemoved, etc. The adapter should extend this class instead of RecyclerView.Adapter. impo...

You can save the layout of your tabs and windows to standardize your work environment. The layouts menu can be found in the upper right corner of Unity Editor: Unity ships with 5 default layouts (2 by 3, 4 Split, Default, Tall, Wide) (marked with 1). In the picture above, aside from default layo...

The java.util.LinkedList class, while implementing java.util.List is a general-purpose implementation of java.util.Queue interface too operating on a FIFO (First In, First Out) principle. In the example below, with offer() method, the elements are inserted into the LinkedList. This insertion operat...

The Object.freeze() method is available since version 5.1. For older versions, you can use the following code (note that it also works in versions 5.1 and later): var ColorsEnum = { WHITE: 0, GRAY: 1, BLACK: 2 } // Define a variable with a value from the enum var currentColor = Co...