Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Articles by Chandu yadav
Page 5 of 81
FILTER_VALIDATE_IP constant in PHP
The FILTER_VALIDATE_IP constant validates an IP address. Flags FILTER_FLAG_IPV4 − The value must be a valid IPv4 address FILTER_FLAG_IPV6 − The value must be a valid IPv6 address FILTER_FLAG_NO_PRIV_RANGE − The value must not be within a private range FILTER_FLAG_NO_RES_RANGE − The value must not be within a reserved range Return The FILTER_VALIDATE_IP constant does not return anything. Example The following is the output. Invalid IP address! Let us see another example. Here is the output. Valid IP address!
Read MoreComparing enum members in C#
To compare enum members, use the Enum.CompareTo() method.Firstly, set the values for students.enum StudentRank { Tom = 3, Henry = 2, Amit = 1 };Now use the compareTo() method to compare one enum value with another.Console.WriteLine( "{0}{1}", student1.CompareTo(student2) > 0 ? "Yes" : "No", Environment.NewLine );The following is the code to compare enum members in C#.Exampleusing System; public class Demo { enum StudentRank { Tom = 3, Henry = 2, Amit = 1 }; public static void Main() { StudentRank student1 = StudentRank.Tom; StudentRank student2 = StudentRank.Henry; StudentRank student3 ...
Read MoreC# Program to skip elements from a sequence as long as the specified condition is true
Use the SkipWhile() method to skip elements from a sequence as long as the specified condition is true.The following is the array −int[] marks = { 35, 42, 48, 88, 55, 90, 95, 85 };Here is the condition.s => s >= 50As long as the above condition is true, the elements above 50 are skipped as shown below −Exampleusing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { int[] marks = { 35, 42, 48, 88, 55, 90, 95, 85 }; // skips elements above 50 IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).SkipWhile(s => s >= 50); // displays rest of the elements Console.WriteLine("Skipped marks > 60..."); foreach (int res in selMarks) { Console.WriteLine(res); } } }OutputSkipped marks > 60... 48 42 35
Read MoreSchedule a task for execution in Java after a given delay
One of the methods in the Timer class is the void schedule(Timertask task, long delay) method. This method schedules the specified task for execution after the specified delay.Declaration −The java.util.Timer.schedule(Timertask task, long delay) is declared as follows −public void schedule(Timertask task, long delay)There are few exceptions thrown by the schedule(Timertask task, long delay) method. They are as follows −IllegalArgumentExceptionThis exception is thrown if delay is negative, or delay + System.currentTimeMillis() is negative.IllegalStateExceptionThis exception is thrown if task was scheduled or cancelled beforehand, timer was cancelled, or timer thread terminated.NullPointerExceptionThis exception is thrown if the task is null.Let us see a ...
Read MoreSecure Hashes and Message Digest in Python
For the secure hash and message digest process, we should use the hashlib module. This module implements a common interface for different secure hash algorithm like SHA1, SHA224, SHA256, SHA512 etc. Also the RSA’s MD5 algorithm. Older algorithms are known as the Message Digest and the new methods are called Secure Hash. To use this module, we need to import the hashlib module in the python code. import hashlib In this method, there are some predefined algorithms like md5, sha1, sha224, sha256, sha512 are present. We can add additional algorithms from the OpenSSL library. Some methods, constants of ...
Read MoreFILTER_SANITIZE_ENCODED constant in PHP
The FILTER_SANITIZE_ENCODED constant encodes special characters.Flags and OptionsFILTER_FLAG_STRIP_LOW − Remove characters with ASCII value less than 32FILTER_FLAG_STRIP_HIGH − Remove characters with ASCII value greater than 127FILTER_FLAG_ENCODE_LOW − Encode characters with ASCII value less than 32FILTER_FLAG_ENCODE_HIGH − Encode characters with ASCII value greater than 127ReturnThe FILTER_SANITIZE_ENCODED constant does not return anything.ExampleThe following is an example that use FILTER_FLAG_ENCODE_HIGH flag to encode characters with ASCII value > 127ExampleOutputThe following is the output.www.example.comLet us see another example.ExampleOutputHere is the output.example.com
Read MoreHow to throw a C++ exception?
Exception handling is used to handle the exceptions. We can use try catch block to protect the code. Exception can be thrown anywhere within the code block. The keyword “throw” is used to throw an exception.Here is an example of throw in C++ language,Example#include using namespace std; int display(int x, int y) { if( y == 0 ) { throw "Division by zero condition!"; } return (x/y); } int main () { int a = 50; int b = 0; int c = 0; try { c = display(a, b); cout
Read MoreData Types we cannot use to create array in C
An array can be created using all data types such as int, char, float, double etc. But creating an array by using the void data type is not possible. An error will be displayed if that is done.A program that demonstrates this is given as follows.Example#include #include int main() { void arr1[4]; printf("A void array"); return 0; }OutputThe above program returns the following error.error: declaration of ‘arr1’ as array of voids void arr1[4];Now let us understand the above program.An array arr1 of void data type is created in the above program. Since this is not ...
Read MoreCall the run() method of the Timer Task in Java
The java.util.TimerTask.run() method looks onto the action to be performed by the task. It is used to carry out the action performed by the task.Declaration −The java.util.TimerTask.run() method is declared as follows −public abstract void run()Let us see an example program to call the run() method of the Timer Task −Exampleimport java.util.*; class MyTask extends TimerTask { public void run() { System.out.println("Running"); } } public class Example { public static void main(String[] args) { // creating timer task, timer TimerTask task = new MyTask(); Timer ...
Read Moreexpm1() in C++
The function expm1() is used to calculate the exponential raised to the power of any number minus one. It returns the value of (exponential raised to the power of a) - 1.Here is the mathematical expression of expm1(),expm1(a) = (e^a) - 1Here is the syntax of expm1() in C++ language,float expm1(variable_name);Here,variable_name − Any name given to the variable whose value is calculated.Here is an example of expm1() in C++ language,Example#include #include using namespace std; int main() { int x = 10; float y = 8.28; cout
Read More