Purpose of linecache module in Python’s standard library is to facilitate random access to any text file, although this module is extensively used by Python’s traceback module to generate error trace stack. Further prettyprints of reading are held in a cache so that it saves time while reading lines repeatedly.The ... Read More

The symbol in MySQL is same as not equal to operator (!=). Both gives the result in boolean or tinyint(1). If the condition becomes true, then the result will be 1 otherwise 0.Case 1 − Using != operator.The query is as follows −mysql> select 3!=5;The following is the output.+------+ ... Read More

To select increment counter in MySQL, first you need to declare and initialize a variable. The syntax is as follows −set @anyVariableName=0; select yourColumnName, @anyVariableName:=@anyVariableName+1 as anyVariableName from yourTableName;To understand the above syntax and set an increment counter, let us first create a table. The query to create a table ... Read More

The syntax for updating a column with random number between 1-3 is is as follows −update yourTableName set yourColumnName=FLOOR(1+RAND()*3);To understand the above syntax, let us first create a table. The query to create a table is as follows −mysql> create table UpdateNumber1To3 -> ( -> MyNumber int -> ); Query ... Read More

Following is a program to get the result of Euler’s Totient function for all numbers smaller than or equal to n when n is given.Programimport java.util.Scanner; public class EulerTotient {    public static int gcd(int a,int b){       int i, hcf = 0;          for(i = 1; i

Following is a Java program to find the divisors of factorials of a number.Programimport java.util.Scanner; public class DivisorsOfFactorial {    public static long fact(int i) {       if(i

An array is created using the java.lang.reflect.Array.newInstance() method. This method basically creates a new array with the required component type as well as length.The array is filled using the java.lang.reflect.Array.setInt() method. This method sets the required integer value at the index specified for the array.The array displayed using the for ... Read More

An array of objects can be sorted using the java.util.Arrays.sort() method with a single argument required i.e. the array to be sorted. A program that demonstrates this is given as follows −Example Live Demoimport java.util.Arrays; public class Demo {    public static void main(String args[]) throws Exception {       ... Read More

The java.math.BigInteger.modInverse(BigInteger m) returns a BigInteger whose value is (this-1 mod m). Using this method you can calculate Modular multiplicative inverse for a given number.ProgramLive Demoimport java.math.*; public class BigIntegerDemo {    public static void main(String[] args) {       // create 3 BigInteger objects       BigInteger ... Read More

A byte array can be sorted using the java.util.Arrays.sort() method with a single argument required i.e. the array to be sorted. A program that demonstrates this is given as follows −Example Live Demoimport java.util.Arrays; public class Demo {    public static void main(String[] args) {       byte[] arr = ... Read More