Tutorial by Examples: in

Hyperlink

The HyperLink control is used to navigate from the client to another page. <html> <script language="VB" runat="server"> Sub Page_Load(sender As Object, e As EventArgs) ' Set hyperlink to "~", which indicates application root. Hyper...

ASP.NET • WebForms

isometric character animating + movement

① the concepts used in this Example : ClassUsageURLRequest + Loader + EventLoading atlas map (sprite) from external path.BitmapData + Sprite + beginBitmapFill +Matrix + stageWidth & stageHeightdrawing loaded resources to bitmapdata, using tiled bitmaps, drawing with transformation.MovieClip + s...

ActionScript 3 • Game Development Basics

Using Qt:DirectConnection when receiver object doesn't receive signal

Some times you see a signal is emitted in sender thread but connected slot doesn't called (in other words it doesn't receive signal), you have asked about it and finaly got that the connection type Qt::DirectConnection would fix it, so the problem found and everything is ok. But generaly this is ba...

Qt • Common Pitfalls

Invisible characters

Show or hide invisible characters To show invisible characters: :set list To hide invisible characters: :set nolist To toggle between showing and hiding invisible characters: :set list! Default symbol characters SymbolCharacter^ITab$New Line Customize symbols To set the tab characte...

vim • Vim Options

Import existing repository to Bitbucket

Go to the repository you want to clone (something like: https://bitbucket.org/username/repo) On the top menu, choose Repository -> Import repository In the Old repository section, enter the source (CodePlex, Git, Google Code, Mercurial, Source Code, Subversion) and the URL In the New reposi...

bitbucket • Import repository into Bitbucket

Classes and Multiple Inheritance

Swift does not support multiple inheritance. That is, you cannot inherit from more than one class. class Animal { ... } class Pet { ... } class Dog: Animal, Pet { ... } // This will result in a compiler error. Instead you are encouraged to use composition when creating your types. This can b...

Swift Language • Classes

A simple Hive UDF within Apache Spark

import org.apache.spark.sql.functions._ // Create a function that uses the content of the column inside the dataframe val code = (param: String) => if (param == "myCode") 1 else 0 // With that function, create the udf function val myUDF = udf(code) // Apply the udf to a column in...

Scala Language • User Defined Functions for Hive

Iterate all items in the dictionary

set oDic = CreateObject("Scripting.Dictionary") oDic.add "USA", "United States of America" oDic.add "UK", "United Kingdom" oDic.add "CAN", "Canada" For Each obj in oDic.Items Msgbox obj Next Set oDic = Nothing *Out...

vbscript • Dictionary Objects

Iterate all keys in dictionary

set oDic = CreateObject("Scripting.Dictionary") oDic.add "USA", "United States of America" oDic.add "UK", "United Kingdom" oDic.add "CAN", "Canada" For Each obj in oDic.keys Msgbox "Key: " & obj & &quo...

vbscript • Dictionary Objects

Global Exception Handling in ASP.NET Core

UseExceptionHandler can be used to handle exceptions globally. You can get all the details of exception object like Stack Trace, Inner exception and others. And then you can show them on screen. You can easily implement like this. app.UseExceptionHandler( options => { options.Run( as...

asp.net-core • Error Handling

Sending Downstream Messages via cURL

You can test sending messages using the FCM REST API by sending a request through cURL. curl --header "Authorization: key=<API_KEY>" \ --header Content-Type:"application/json" \ https://fcm.googleapis.com/fcm/send \ -d "{\"registration_ids...

firebase-cloud-messaging • Firebase Cloud Messaging

(De-)Initialization of openssl library

Overview Openssl consists of 2 libraries: libcrypto and libssl. Before openssl API can be used in an application, mandatory initialization procedures are expected to be performed. Once application is done with openssl related work, it is expected to cleanup allocated resources. Code below does com...

openssl • Getting started with openssl

IOS 10 Permission required for accessing Camera, Photo library ....

iOS 10 Now Requires User Permission to Access Media Library, Photos, Camera and other Hardware like these. The solution for this is to add their keys into info.plist with description for user that how we are using their data , iOS already required permissions to access microphone, camera, and m...

ios10 • iOS 10 - Changes in asking permissions of Camera,Photo Library causing application to crash

Using and misusing GROUP BY

SELECT item.item_id, item.name, /* not SQL-92 */ COUNT(*) number_of_uses FROM item JOIN uses ON item.item_id, uses.item_id GROUP BY item.item_id will show the rows in a table called item, and show the count of related rows in a table called uses. This works well, but unfo...

MySQL • Error 1055: ONLY_FULL_GROUP_BY: something is not in GROUP BY clause ...

Misusing GROUP BY to return unpredictable results: Murphy's Law

SELECT item.item_id, uses.category, /* nonstandard */ COUNT(*) number_of_uses FROM item JOIN uses ON item.item_id, uses.item_id GROUP BY item.item_id will show the rows in a table called item, and show the count of related rows in a table called uses. It will also show the va...

MySQL • Error 1055: ONLY_FULL_GROUP_BY: something is not in GROUP BY clause ...

css in action

#include <gtk/gtk.h>//jjk.c static void destroy(GtkWidget *widget, gpointer data) { gtk_main_quit(); } int main(int argc, char *argv[]) { gtk_init(&argc, &argv); GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_window_set_title(GTK_WINDOW(window), "Window&quot...

gtk3 • gtk+3 linux c

Misusing GROUP BY with SELECT *, and how to fix it.

Sometimes a query looks like this, with a * in the SELECT clause. SELECT item.*, /* nonstandard */ COUNT(*) number_of_uses FROM item JOIN uses ON item.item_id, uses.item_id GROUP BY item.item_id Such a query needs to be refactored to comply with the ONLY_FULL_GROUP_BY sta...

MySQL • Error 1055: ONLY_FULL_GROUP_BY: something is not in GROUP BY clause ...

Caching HTTP responses

A typical use case for RxJS is creating HTTP requests and caching their results for some period of time. Also, we always want to run only one request at a time and share its response. For example the following code caches 1 item for max. 1000ms: var updateRequest = Observable.defer(() => makeMo...

rxjs • Common recipes

Using a local module for easier querying

To simplify your querying from ORACLE-DB, you may want to call your query like this: const oracle = require('./oracle.js'); const sql = "select 'test' as c1, 'oracle' as c2 from dual"; oracle.queryObject(sql, {}, {}) .then(function(result) { console.log(result.rows[0]['C...

Node.js • Node.js with Oracle

Using trash to manage ./vendor

trash is a minimalistic vendoring tool that you configure with vendor.conf file. This example is for trash itself: # package github.com/rancher/trash github.com/Sirupsen/logrus v0.10.0 github.com/urfave/cli v1.18.0 github.com/cloudfoundry-incubat...

Go • Vendoring