Tutorial by Topics: es

If you commit sensitive data, such as a password or SSH key into a Git repository, you can remove it from the history. To entirely remove unwanted files from a repository's history you can use either the git filter-branch command or the BFG Repo-Cleaner. Tell your collaborators to rebase, ...

In this topic I would like to mention all possible global variables which can be used in Apex code. Like [UserInfo Class][1]. I suggest we just list a global classes/variables and links. If you know about a global class/variable but can't find a documentation, please provide as much informati...

A column is NULL when it has no value, regardless of the data type of that column. A column should never be compared to NULL using this syntax a = NULL as the result would be UNKNOWN. Instead use a IS NULL or a IS NOT NULL conditions. NULL is not equal to NULL. To compare two expressions where null...

COMMMENT main purpose is to define or change a comment on database object. Only a single comment(string) can be given on any database object.COMMENT will help us to know what for the particular database object has been defined whats its actual purpose is. The rule for COMMENT ON ROLE is that you m...

As the name implies, vector drawables are based on vector graphics. Vector graphics are a way of describing graphical elements using geometric shapes. This lets you create a drawable based on an XML vector graphic. Now there is no need to design different size image for mdpi, hdpi, xhdpi and etc. W...

A notorious common question is "how to send notifications from device to device", sadly the answer is: you can't. FCM needs to be triggered in order to send push notifications. That can be done in 3 different ways: Directly in the Firebase web console Setting a Firebase Functions li...

When you receive an error: "Microsoft Access has encountered a problem and needs to close", there is often not a lot of information to help you identify the cause of the error. Below are a series of steps you can take to troubleshoot the cause of the errors. Be sure to remove other vari...

By going through this document You can get to know how to use SQL queries with powershell ItemDescription$ServerInstanceHere we have to mention the instance in which the database is present$DatabaseHere we have to mention the database in which the table is present$QueryHere we have to the query whi...

This topic is a collection of solutions to common tasks in PHP. The examples provided here will help you overcome a specific problem. You should already be familiar with the basics of PHP.

Basic examples of how to create cells with a formula for calculations within the Excel sheet.

Given Below are the examples to show how bootstrap model can be shown and how to manage title main content and footer. This topic is created to demonstrate different ways of showing and easily managing bootstrap model.

Packages in Scala manage namespaces in large programs. For example, the name connection can occur in the packages com.sql and org.http. You can use the fully qualified com.sql.connection and org.http.connection, respectively, in order to access each of these packages.

Firebase Cloud Messaging (FCM) is a cross-platform messaging solution that lets you reliably deliver messages at no cost. Using FCM, you can notify a client app that new email or other data is available to sync. You can send notification messages to drive user reengagement and retention. For use ca...

In iOS 10 Apple is extending the scope of privacy control. User need to ask the use permission before access the user private data in following key :Calendar,Contact,Reminder,Photo,Bluetooth Sharing,Microphone , Camera ,Location,Heath,HomeKit ,MediaLibrary,Motion,CallKit,Speech Recognition, SiriKit...

A collection of common use cases and their implementation in RxJS.

@angular/common - commonly needed directives and services @angular/core - the angular core framework

In this topic you'll find a summary of the new features added to the Java programming language in Java SE 8. There are many other new features in other fields such as JDBC and Java Virtual Machine (JVM) that are not going to be covered in this topic. Reference: Enhancements in Java SE 8

In this topic you'll find a summary of the new features added to the Java programming language in Java SE 7. There are many other new features in other fields such as JDBC and Java Virtual Machine (JVM) that are not going to be covered in this topic. Enhancements in Java SE 7