MySQL2023-05-02
sql if null then 0
In SQL, you can use the IS NULL condition to check if a value is NULL. To return 0 when the value is NULL, you can use the COALESCE function or the IFNULL function, depending on th
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J2ME2023-05-02
Is J2ME dead?
J2ME (Java 2 Micro Edition) is a platform that allows developers to build mobile and embedded applications that can run on resource-constrained devices. Although its popularity has
Read tutorialStruts2023-05-01
Guidelines for Struts Application Development
Struts application development in enterprise applications requires discipline. We are not referring to any particular methodology; just some guidelines for Struts based application
Read tutorialJava2023-05-01
DateFormat sample program in Java
DateFormat is an abstract class that provides the ability to format and parse dates and times. The getDateInstance() method returns an instance of DateFormat that can format date i
Read tutorialJava2023-05-01
concurrent.Flow instead of Observable class in Java
To observe an observable object, you must implement the Observer interface. This interface defines only the one method shown here:
Read tutorialJavascript2023-04-26
mixin in JavaScript
In JavaScript, a mixin is a way to add or "mix in" functionality to an object without inheriting from it. It's a way to combine objects to create a new object that has the properti
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Javascript2023-04-26
apply() in JavaScript
apply() is a method in JavaScript that allows you to call a function with a given this value and arguments provided as an array. It is similar to the call() method, but with apply(
Read tutorialJavascript2023-04-26
call in JavaScript
In JavaScript, call() is a method that allows you to call a function with a given this value and arguments provided individually. The syntax for call() is
Read tutorialJavascript2023-04-26
bind in JavaScript
In JavaScript, the bind() method creates a new function that, when called, has its this keyword set to a specified value. It allows you to pass a specific this context to a functio
Read tutorialJavascript2023-04-26
promise and .then() in JavaScript
A promise is an object in JavaScript that represents the eventual completion or failure of an asynchronous operation, and its resulting value. It allows you to write asynchronous c
Read tutorialJavascript2023-04-26
reduce() and filter() in JavaScript
reduce() and filter() are higher-order array functions in JavaScript that allow you to perform operations on arrays in a more concise and readable way.
Read tutorialJavascript2023-04-26
IIFE in JavaScript
IIFE stands for Immediately Invoked Function Expression. It's a way to create a self-executing function in JavaScript. The main idea is to write a function that is executed immedia
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