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Articles on Trending Technologies
Technical articles with clear explanations and examples
How OLD and NEW keywords enable us to access columns in row affected byna trigger?
As we know that in trigger definition, we can refer to columns of the row being inserted, updated or deleted. Following are the ways OLD and NEW keywords enable us to access columns − We must have to prefix the column name with a qualifier of OLD to refer to a value from the original row. We must have to prefix the column name with a qualifier of NEW to refer to a value in the new row. Now, the use of OLD and NEW must be done appropriately because the triggering event Determines which of them are ...
Read MoreWhat is the package for String Class in Java?
String class belongs to the java.lang package.
Read MoreWhat is the difference between >> and >>> operators in Java?
>> Binary Right ShiftThe left operand value is moved right by the number of bits specified by the right operand.>>> Shift right zero fillThe left operand value is moved right by the number of bits specified by the right operand and shifted values are filled up with zeros.
Read MoreIs StringBuffer final in Java?
Yes, StringBuffer class is final Java. We cannot override this class.
Read MoreWhy we do not import a package while we use any string function?
The String class belongs to the java.lang package. This is the default package of the Java language therefore it is not mandatory to import it to use its classes.
Read MoreWhat is the role of C++ in Computer Science?
C++ is a programming language developed by Bjarne Stroustrup in 1979 at Bell Labs. C++ is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features. It is a superset of C, and that virtually any legal C program is a legal C++ program. C++ runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.It was designed with a bias toward system programming and embedded, resource-constrained and large systems, with performance, efficiency and flexibility of use as its design highlights. It has been used in the ...
Read MoreWhy C++ is the Best Programming Language?
C++ is known to be a very powerful language. C++ allows you to have a lot of control as to how you use computer resources, so in the right hands, its speed and ability to cheaply use resources should be able to surpass other languages. Thanks to C++'s performance, it is often used to develop game engines, games, and desktop apps. Many AAA title video games are built with C++.C++'s greatest strength is how scalable it could be, so apps that are very resource intensive are usually built with it. As a statically typed language, C++ is generally more performant ...
Read MoreJava string concat() method vs "+" operator
The notable differences between concat() method and +operator are:concat() method+operatorYou cannot concat a null value to a String using the concat() method.You can concat null value using the ‘+’ operator.Using the concat() method you can concat only two String variables.Using the ‘+’ operator you can concat multiple values.Using the concat() method you can concat only String type of arguments.Using the ‘+’ operator you can concat any type of arguments.
Read MoreDifference between HashMap and HashTable in Java.
HashMap is non-syncronized and is not thread safe while HashTable is thread safe and is synchronized. HashMap allows one null key and values can be null whereas HashTable doesn't allow null key or value. HashMap is faster than HashTable. HashMap iterator is fail-safe where HashTable iterator is not fail-safe. HashMap extends AbstractMap class where HashTable extends Dictionary class.
Read MoreHow to exit from a Python if clause?
It is not possible to exit from an if block of Python code. The break keyword does appear in if block but it has to inside a loop. It is however possible to exit from entire program from inside if block by sys.exit()
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