Tutorial by Examples: an

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Vim's standard search commands are / for forward search and ? for backward search. To start a search from normal mode: press /, type your pattern, press <CR> to perform the search. Examples: /foobar<CR> search forward for foobar ?foo\/bar<CR> search backward for ...

The :global command already has its own topic: The global command

You can open a new split within Vim with the following commands, in normal mode: Horizontally: :split <file name> :new Vertically: :vsplit <file name> :vnew split will open the file in a new split at the top or left of your screen (or current split.) :sp and :vs are convenie...

A lexer rule can have associated commands: WHITESPACE: [ \r\n] -> skip; Commands are defined after a -> at the end of the rule. skip: Skips the matched text, no token will be emited channel(n): Emits the token on a different channel type(n): Changes the emitted token type mode(n), pu...

A lexer action is a block of arbitrary code in the target language surrounded by {...}, which is executed during matching: IDENTIFIER: [A-Z]+ { log("matched rule"); }; A semantic predicate is a block of arbitrary code in the target language surrounded by {...}?, which evaluates to a bo...

if we want to change the Controllers directory we need: Move and/or rename the default Controllers directory where we want it. For example from app/Http/Controllers to app/Controllers Update all the namespaces of the files inside the Controllers folder, making they adhere to the new path, re...

Disclaimer: the examples presented here are only for the purpose of showing the use of abstract classes and inheritance and may not necessarily be of a practical use. Also, there is no sich thing as polymorphic in MATLAB and therefore the use of abstract classes is limited. This example is to show w...

Here is an example of how to import a function that is defined in an unmanaged C++ DLL. In the C++ source code for "myDLL.dll", the function add is defined: extern "C" __declspec(dllexport) int __stdcall add(int a, int b) { return a + b; } Then it can be included into ...

JavaFX 8 The following example demonstrates how to add custom properties that can be styled from css to a custom Node. Here 2 DoublePropertys are added to the Rectangle class to allow setting the width and height from CSS. The following CSS could be used for styling the custom node: StyleableRe...

Objective-C supports a special type called `instancetype that can only be used as type returned by a method. It evaluates to the class of the receiving object. Consider the following class hierarchy: @interface Foo : NSObject - (instancetype)initWithString:(NSString *)string; @end @interf...

UCanAccess is a pure Java JDBC driver that allows us to read from and write to Access databases without using ODBC. It uses two other packages, Jackcess and HSQLDB, to perform these tasks. Once it has been set up*, we can work with data in .accdb and .mdb files using code like this: import java.sq...

It's important to know how CMake distinguishes between lists and plain strings. When you write: set(VAR "a b c") you create a string with the value "a b c". But when you write this line without quotes: set(VAR a b c) You create a list of three items instead: "a", &q...

When working with multiple open Workbooks, each of which may have multiple Sheets, it’s safest to define and set reference to all Workbooks and Sheets. Don't rely on ActiveWorkbook or ActiveSheet as they might be changed by the user. The following code example demonstrates how to copy a range from...

Download your preferred version from Lightbend with curl: curl -O http://downloads.lightbend.com/scala/2.xx.x/scala-2.xx.x.tgz Unzip the tar file to /usr/local/share or /opt/bin: unzip scala-2.xx.x.tgz mv scala-2.xx.x /usr/local/share/scala Add the PATH to ~/.profile or ~/.bash_profile or ...

Case classes provide a copy method that creates a new object that shares the same fields as the old one, with certain changes. We can use this feature to create a new object from a previous one that has some of the same characteristics. This simple case class to demonstrates this feature: case cla...

The idea behind programming to an interface is to base the code primarily on interfaces and only use concrete classes at the time of instantiation. In this context, good code dealing with e.g. Java collections will look something like this (not that the method itself is of any use at all, just illus...

{ "description": "My awesome library", "dependencies": { "NETStandard.Library": "1.6.0" }, "frameworks": { "netstandard1.3": { } } } A library that targets netstandard1.3 can be used on any fr...

{ "description": "My awesome library", "dependencies": { }, "frameworks": { "net40": { }, "netstandard1.3": { "dependencies": { "NETStandard.Library": "1.6.0" ...