To count the number of lines in a fileInstantiate the FileInputStream class by passing an object of the required file as parameter to its constructor.Read the contents of the file to a bytearray using the read() method of FileInputStream class.Instantiate a String class by passing the byte array obtained, as a parameter its ... Read More

You can convert an array of Strings to a single array using the collect() method.ExampleLive Demoimport java.util.Arrays; import java.util.stream.Collectors; public class CreatngStringFromArray {    public static void main(String args[]) {       String [] myArray = {"Welcome", "to", "Tutorialspoint"};       String str = Arrays.stream(myArray).collect(Collectors.joining(" ")); ... Read More

You can define constants in C++ by adding the const qualifier before the declaration of the variable. Example#include using namespace std; int main() {    const int x = 9;    x = 0;    return 0; }This will define the constant variable x. But it will throw an error ... Read More

Suppose in our ‘Employee’ table we are having NULL as the value of ‘salary’ column for two employees. The data, shown as follows, is itself not meaningful.mysql> Select * from employee; +----+--------+--------+ | ID | Name   | Salary | +----+--------+--------+ | 1 | Gaurav  | 50000  | | 2 ... Read More

std::cerr is an object of class ostream that represents the standard error stream oriented to narrow characters (of type char). It corresponds to the C stream stderr. The standard error stream is a destination of characters determined by the environment. This destination may be shared by more than one standard ... Read More

There are several alternatives for compiling C++ on windows. Let's look at 2 of them:GCCTo install GCC on Windows you need to install MinGW. To install MinGW, go to the MinGW homepage, www.mingw.org, and follow the link to the MinGW download page. Download the latest version of the MinGW installation ... Read More

As we know that COALESCE() function returns first non-NULL value from the list of values. The following IF-THEN-ELSE statement is equivalent to COALESCE() function.IF value1 is not NULL THEN output = value1; ELSIF value2 is not NULL THEN output = value2; ELSIF value3 is not NULL THEN output = value3; ... Read More

JavaScript lang attributeThis attribute specifies what scripting language you are using. Typically, its value will be javascript. Although recent versions of HTML (and XHTML, its successor) have phased out the use of this attribute.JavaScript type attributeThis attribute is what is now recommended to indicate the scripting language in use and ... Read More

When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).The ... Read More

When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).The ResultSet ... Read More