Tutorial by Examples: u

Donald Knuth is often quoted as saying this: "Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered....

Example Feature file: Feature: Calculator In order to avoid silly mistakes As a math idiot I want to be told the sum of two numbers @mytag Scenario: Add two numbers Given I have entered 50 into the calculator And I have also entered 70 into the calculator When I press ad...

The DeriveFunctor language extension allows GHC to generate instances of Functor automatically. {-# LANGUAGE DeriveFunctor #-} data List a = Nil | Cons a (List a) deriving Functor -- instance Functor List where -- automatically defined -- fmap f Nil = Nil -- fmap f (Cons x xs...

The embed tag is new in HTML5. This element provides an integration point for an external (typically non-HTML) application or interactive content. <embed src="myflash.swf">

Installing Progress Download your distribution from Progress. If you want a demo license you need to contact them. Make sure you download a 64-bit and not a 32-bit tar file (unless you happen to run a 32-bit machine). Windows The download will be a zip archive. Unpack it and simply run setup.exe....

Read a 16-bit unsigned integer from input. This function uses the interrupt service Int 21/AH=0Ah for reading a buffered string. The use of a buffered string let the user review what they had typed before passing it to the program for processing. Up to six digits are read (as 65535 = 216 - 1 has ...

@Component({ ... animations: [ trigger('appear', [ transition(':enter', [ style({ //style applied at the start of animation }), animate('300ms ease-in', style({ ...

Go to the repository you want to create issue for, something like: https://bitbucket.org//<repo_name>/ Go to setting, left bottom corner Select Issue tracker under Issues Select the type of the issue tracker you want to enable (no issue tracking, private or public) Click save Now the ...

Another example of "Hello World" style programs is FizzBuzz. DEFINE VARIABLE i AS INTEGER NO-UNDO. DEFINE VARIABLE cOut AS CHARACTER NO-UNDO. DO i = 1 TO 100: /* Dividable by 3: fizz */ IF i MODULO 3 = 0 THEN cOut = "Fizz". /* Dividable by 5: ...

Go to the repository, e.g.: https://bitbucket.org/username/repo_name/ On the left menu, choose commits Select the commit you want to add comments to On the selected files related to that commit, click on the small + sign appearing near the line numbers A small window will appear to enter the ...

Channel adapter is one of message endpoints in Spring Integration. It is used for unidirectional message flow. There are two types of channel adapter: Inbound Adapter: input side of the channel. Listen or actively read message. Outbound Adapter: output side of the channel. Send message to Java cla...

Print a number in binary, quaternary, octal, hexadecimal and a general power of two All the bases that are a power of two, like the binary (21), quaternary (22), octal (23), hexadecimal (24) bases, have an integral number of bits per digit1. Thus to retrieve each digit2 of a numeral we simply brea...

Go to the repository, e.g.: https://bitbucket.org/username/repo_name/ On the left menu, choose branches On the right side of the branches page, select Create branch A popup window will appear, select Branch from and enter the new branch you want to create in the Branch name textbox Click cre...

Go to the repository, e.g.:https://bitbucket.org/username/repo_name/ On the left menu, choose branches Select the branch you want to delete from the branches page Click on ... at the top right of the page, then click Delete branch A confirmation popup will appear, click Confirm

Linux/Unix Once you have Progress installed it's very easy to run. You only need a couple of environment variables. The directory where Progress was installed (default /usr/dlc but can be something else) needs to be in the DLC-variable DLC=/usr/dlc And you might also want the "bin" s...

In order to access the Google drive API or Google drive SDK you must first register your application on Google Developer console and enable the google drive API. After that its a good idea to use one of the official google client libraries to access the API. DocumentationSamplesGoogle API Client L...

Official Apex Debugger Realtime debugging Force.com IDE requires special licensing from salesforce Welkin Suit Log replay debugging Stand alone IDE Subscription required Illuminated Cloud: Log replay debugging JetBrains Extension Subscription required Salesfor...

You can also go almost bare-metal when producing sound with java. This code will write raw binary data into the OS audio buffer to generate sound. It's extremely important to understand the limitations and necessary calculations to generating sound like this. Since playback is basically instantaneou...

var pipeline = {}; // (...) adding things in pipeline for(var key in pipeline) { fs.stat(pipeline[key].path, function(err, stats) { if (err) { // clear that one delete pipeline[key]; return; } // (...) pipeline[key].count++; }); } The problem i...

Some of the Class properties Ext.Data.Connection PropertiesDetailsurlAddress of the requesttimeoutWaiting time in millisecondssuccessReturn on successfailureReturn on failure Ext.Ajax.on("beforerequest", function(conn , options , eOpts) { console.log("beforerequest"); });...