Tutorial by Examples: id

Add below dependencies to your build.gradle // Facebook login compile 'com.facebook.android:facebook-android-sdk:4.21.1' Add below helper class to your utility package: /** * Created by Andy * An utility for Facebook */ public class FacebookSignInHelper { private static final...

To check that the connection to the server is valid: sqoop list-tables --connect "jdbc:sqlserver://<server_ip>:1433;database=<database_name>" --username <user_name> --password <password> Before doing this it is recommended ...

To access elements of a tuple directly, you can use the format .n to access the n-th element let x = ("hello", 42, true); assert_eq!(x.0, "hello"); assert_eq!(x.1, 42); assert_eq!(x.2, true); You can also partially move out of a tuple let x = (String::from("hello&quo...

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...

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...

extern int var; static int var; /* Undefined behaviour */ C11, §6.2.2, 7 says: If, within a translation unit, the same identifier appears with both internal and external linkage, the behavior is undefined. Note that if an prior declaration of an identifier is visible then it'll have the pri...

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...

When INSERTing, you can use OUTPUT INSERTED.ColumnName to get values from the newly inserted row, for example the newly generated Id - useful if you have an IDENTITY column or any sort of default or calculated value. When programatically calling this (e.g., from ADO.net) you would treat it as a nor...

Unlike emails, JIDs were defined with Internationalization (i18n) in mind using the Preparation, Enforcement, and Comparison of Internationalized Strings (PRECIS) framework. PRECIS (defined in RFC 7564), is a framework for comparing strings safely in a variety of contexts. For instance, imagine you...

Adding a footer is not natively possible. Luckily, we can make use of jQuery and CSS to add a footer to the slides of an ioslides presentation rendered with knitr. First of all we have to include the jQuery plugin. This is done by the line <script src="https://ajax.googleapis.com/ajax/libs...

A Cordova application runs as a website on a WebView component within the native mobile platform. Debugging a cordova application can therefore be done by utilizing your favourite browsers development tools. The following steps are needed to hook the application, running on the device, to the Chrome...

Enable and configure the experimental Gradle plugin to improve AndroidStudio's NDK support. Check that you fulfill the following requirements: Gradle 2.10 (for this example) Android NDK r10 or later Android SDK with build tools v19.0.0 or later Configure MyApp/build.gradle file Edit the dep...

Create Or Replace Function Generateguid Return Char Is V_Guid Char(40); Begin Select Substr(Sys_Guid(),1,8)||'-'||Substr(Sys_Guid(),9,4)||'-' ||Substr(Sys_Guid(),13,4)||'-'||Substr(Sys_Guid(),17,4)||'-' ||Substr(Sys_Guid(),21) Into V_Guid...

To see all the facts involving the le relation from the prelude: Coq < Search le. le_n: forall n : nat, n <= n le_S: forall n m : nat, n <= m -> n <= S m ... max_l: forall n m : nat, m <= n -> Nat.max n m = n max_r: forall n m : nat, n <= m -> Nat.max n m = m ... ...

Bridge pattern decouples abstraction from implementation so that both can vary independently. It has been achieved with composition rather than inheritance. Bridge UML diagram from wikipedia: You have four components in this pattern. Abstraction: It defines an interface RefinedAbstraction: It ...

Problem There is a series of repeating elements in page that you need to know which one an event occurred on to do something with that specific instance. Solution Give all common elements a common class Apply event listener to a class. this inside event handler is the matching selector elemen...

Plot With Grid Lines import matplotlib.pyplot as plt # The Data x = [1, 2, 3, 4] y = [234, 124,368, 343] # Create the figure and axes objects fig, ax = plt.subplots(1, figsize=(8, 6)) fig.suptitle('Example Of Plot With Grid Lines') # Plot the data ax.plot(x,y) # Show the grid lin...

It is common for an AsyncTask to require a reference to the Activity that called it. If the AsyncTask is an inner class of the Activity, then you can reference it and any member variables/methods directly. If, however, the AsyncTask is not an inner class of the Activity, you will need to pass an A...

Middleware are attached to the app object, usually before listen is called. Example of a simple logging middleware: app.use(function (req, res, next) { console.log(`${req.method}: ${req.url}`) next() }) All this will do is log GET: /example if you where to GET localhost:3000/example. ...