Tutorial by Examples: d

This example shows how to optimize the column width so that column headings and data are not chopped off. alv->get_columns( )->set_optimize( ).

This example hides the MANDT (client) field from the ALV. Note that the parameter passed to get_column( ) must be capitalized in order for this to work. alv->get_columns( )->get_column( 'MANDT' )->set_visible( if_salv_c_bool_sap=>false ).

The column text may change upon the horizontal resizing of a column. There are three methods to accomplish this: Method NameMaximum Length of Headingset_short_text10set_medium_text20set_long_text40 The following example shows usage of all three. A column object is declared and instantiated as a re...

By default, when an ALV is displayed, the title at the top is just the program name. This method allows the user to set a title of up to 70 characters. The following example shows how a dynamic title can be set that displays the number of records displayed. alv->get_display_settings( )->set_l...

Suppose you have a parentView into which you want to insert a new subView programmatically (eg. when you want to insert an UIImageView into a UIViewController's view), than you can do it as below. Objective-C [parentView addSubview:subView]; Swift parentView.addSubview(subView) You can also...

CSS .bordered { border-image: linear-gradient(to right, red 20%, green 20%, green 40%, blue 40%, blue 60%, maroon 60%, maroon 80%, chocolate 80%); /* gradient with required colors */ border-image-slice: 1; } HTML <div class='bordered'>Border on all sides</div> The above ex...

FOR JSON clause ignores NULL values in cells. If you want to generate "key": null pairs for cells that contain NULL values, add INCLUDE_NULL_VALUES option in the query: SELECT top 3 object_id, name, type, principal_id FROM sys.objects FOR JSON PATH, INCLUDE_NULL_VALUES NULL values in...

If you need some complex JSON structure that cannot be created using FOR JSON PATH or FOR JSON AUTO, you can customize your JSON output by putting FOR JSON sub-queries as column expressions: SELECT top 5 o.object_id, o.name, (SELECT column_id, c.name FROM sys.columns c WHERE o...

ORDER BY clause sorts rows in the returned result set by some column or expression: SELECT * FROM sys.objects ORDER BY create_date

SELECT statement can be executed without FROM clause: declare @var int = 17; SELECT @var as c1, @var + 2 as c2, 'third' as c3 In this case, one row with values/results of expressions are returned.

C11 This was a new storage specifier introduced in C11 along with multi-threading. This isn't available in earlier C standards. Denotes thread storage duration. A variable declared with _Thread_local storage specifier denotes that the object is local to that thread and its lifetime is the entire e...

This example shows a helper class that contains methods useful, when executing the queries for data. Every method here uses Java Generic's in order to be very flexible. public <T> List<T> selectElements(AbstractDao<T, ?> dao) { if (dao == null) { return null; } ...

For some reasons you may want to ignore your build variants. For example: you have 'mock' product flavour and you use it only for debug purposes, such as unit/instrumentation tests. Let's ignore mockRelease variant from our project. Open build.gradle file and write: // Remove mockRelease as it...

@Singleton @Component(modules = AppModule.class) public interface AppComponent { void inject(App app); Context provideContext(); Gson provideGson(); MainActivityComponent mainActivityComponent(ActivityModule activityModule); } @ActivityScope @Subcomponent(modules = Act...

Add the following dependencies to your application. compile 'com.facebook.stetho:stetho:1.5.0' compile 'com.facebook.stetho:stetho-okhttp3:1.5.0' In your Application class' onCreate method, call the following. Stetho.initializeWithDefaults(this); When creating your Retrofit instance, crea...

This technique details how to ensure that your .apk has been signed with your developer certificate, and leverages the fact that the certificate remains consistent and that only you have access to it. We can break this technique into 3 simple steps: Find your developer certificate signature. Em...

The following are some of the more common/useful shortcuts. These are based on the default IntelliJ shortcut map. You can switch to other common IDE shortcut maps via File -> Settings -> Keymap -> <Choose Eclipse/Visual Studio/etc from Keymaps dropdown> ActionShortcutFormat codeCTRL...

Enable Offline Work: Click File -> Settings. Search for "gradle" and click in Offline work box. Go to Compiler (in same settings dialog just below Gradle) and add --offline to Command-line Options text box. Improve Gradle Performance Add following two line of code in your gradle...

System Requirements Microsoft® Windows® 8/7/Vista/2003 (32 or 64-bit). Mac® OS X® 10.8.5 or higher, up to 10.9 (Mavericks) GNOME or KDE desktop Installation Window Download and install JDK (Java Development Kit) version 8 Download Android Studio Launch Android Studio.exe then mention J...

q = Queue.new q << "any object including another queue" # or q.push :data There is no high water mark, queues can infinitely grow. #push never blocks