Tutorial by Examples: v

If we want to get the x-cordinate of origin of the view, then we need to write like: view.frame.origin.x For width, we need to write: view.frame.size.width But if we add a simple extension to an UIView, we can get all the attributes very simply, like: view.x view.y view.width view.height...

$ IFS= read -r foo <<EOF > this is a \n line >EOF $ printf '%s\n' "$foo" this is a \n line

ALTER TABLE table_name MOVE PARTITION partition_name TABLESPACE tablespace_name;

Using some setters, without setting all needed properties in the constructor(s) public final class Person { // example of a bad immutability private final String name; private final String surname; public Person(String name) { this.name = name; } public String ge...

JasperSoft Studio If datasource or database connection is needed to fill report, create your Data Adapter in Repository Explorer by right clicking "Data Adapters" selecting "Create Data Adapter" Enter preview mode by selecting the Preview tab (no errors in deign need t...

Common Requirements All reports, regardless of how the data is presented, take a path to the report template and a parameter map. The variables are used in all examples that follow: // Parameters passed into the report. Map<String, Object> parameters = new HashMap<>(); // Arbitrary...

When working with Azure using PowerShell there are 2 different ways you should be aware of and you will see a lot of the Microsoft documentation referring to both of them: "Classic mode (Service Management)" This is the old way of operating Azure and managing Azure. There is still some s...

:s/foo/bar/c Marks the first instance of foo on the line and asks for confirmation for substitution with bar :%s/foo/bar/gc Marks consecutively every match of foo in the file and asks for confirmation for substitution with bar

Some ADO.NET providers (most notably: OleDB) do not support named parameters; parameters are instead specified only by position, with the ? place-holder. Dapper would not know what member to use for these, so dapper allows an alternative syntax, ?foo?; this would be the same as @foo or :foo in other...

It's possible to pass Java objects to Nashorn engine to be processed in Java code. At the same time, there are some JavaScript (and Nashorn) specific constructions, and it's not always clear how they work with java objects. Below there is a table which describes behaviour of native Java objects ins...

ggplot(data = diamonds, aes(x = cut, fill =color)) + geom_bar(stat = "count", position = "dodge") it is possible to obtain an horizontal bar chart simply adding coord_flip() aesthetic to the ggplot object: ggplot(data = diamonds, aes(x = cut, fill =color)) + geom_ba...

Violin plots are kernel density estimates mirrored in the vertical plane. They can be used to visualize several distributions side-by-side, with the mirroring helping to highlight any differences. ggplot(diamonds, aes(cut, price)) + geom_violin() Violin plots are named for their resemblance...

C# developers get a lot of null reference exceptions to deal with. F# developers don't because they have the Option type. An Option<> type (some prefer Maybe<> as a name) provides a Some and a None return type. It makes it explicit that a method may be about to return a null record. For...

One of Angular's strength's is client-side form validation. Dealing with traditional form inputs and having to use interrogative jQuery-style processing can be time-consuming and finicky. Angular allows you to produce professional interactive forms relatively easily. The ng-model directive provide...

Sometimes you may need additional features from a directive. Instead of rewriting (copy) the directive, you can modify how the directive behaves. The decorator will be executed during $inject phase. To do so, provde a .config to your module. The directive is called myDirective, so you have to con...

Angular js directives can be nested or be made interoperable. In this example, directive Adir exposes to directive Bdir it's controller $scope, since Bdir requires Adir. angular.module('myApp',[]).directive('Adir', function () { return { restrict: 'AE', controlle...

A quick note before actually installing RabbitMQ: Ubuntu 14.04's Erlang packages have issues if you are using SSL with RabbitMQ, so you'll need to install a newer version than what the Ubuntu package maintainers provide, so use the binaries at https://www.erlang-solutions.com/resources/download.html...

Here are examples of how to use monotonic predicates instead of impure, non-monotonic constructs in your programs: dif/2 is meant to be used instead of non-monotonic constructs like (\=)/2 arithmetic constraints (CLP(FD), CLP(Q) and others) are meant to be used instead of moded arithmetic predi...

To interact with WebElements in a webpage, first we need to identify the location of the element. By is the keyword available in selenium. You can locate the elements By.. By ID By Class Name By TagName By Name By Link Text By Partial Link Text By CSS Selector By XPath Using JavaScript ...

set can also be invoked with just one argument. When called with just one argument, it returns the contents of that argument. % set x 235 235 % set x 235