Server Side Programming Articles - Page 2363 of 2646

Here we are using regular expression package for extracting email-id from the URL-text file. Given the URL- text file. Using regular expression package we define the pattern of email-id then use findall() function, using this method to check the text which will match with this pattern. Input text= Please contact us at contact@tutorialspoint.com for further information."+\ " You can also give feedback at feedback@tutorialspoint.com" Output ['contact@tutorialspoint.com ', 'feedback@tutorialspoint.com'] Example code import re my_text = "Please contact us at contact@tutorialspoint.com for further information."+\ " You can also give feedback at feedback@tutorialspoint.com" my_emails = re.findall(r"[a-z0-9\.\-+_]+@[a-z0-9\.\-+_]+\.[a-z]+", ... Read More

Floating number is a number that has a decimal point and can represent both large and very small values. Binary number is a number expressed in the base-2 numeral system, using 0's and 1's. The conversion of floating-point number to binary representation in Python requires to represent the number in the IEEE 754 format(a set of representation of numerical values and symbols). For example, consider a floating number 9.87, its IEEE 754 32-bit binary representation (1 bit for the sign, 8 bits for exponent, and 23 bits for the significand) is "01000001000111011110101110000101". In this article, we will discuss different ways ... Read More

In this article, we will discuss different methods used to right rotate a list from the given rotation number. A list has comma-separated values (items) of same type or different type between square brackets. To right rotate a list by n, Python offers many ways such as using slicing, rotate() method of the deque object and others. Let's discuss these ways in detail with examples - myList = [5, 20, 34, 67, 89, 94, 98, 110] The following is the output if we assign n as 4 − 89, 94, 98, 110, 5, 20, 34, 67 Right ... Read More

There will be times when we misspell some words when we write something. To overcome this problem, we use the PyEnchant module in Python. This module is used to check the spelling of words and suggest corrections that are misspelled words. It is also used in many popular tasks, including ispell, aspell, and MySpell. It is very flexible in handling multiple dictionaries and multiple languages. For example, if the input is 'prfomnc', then the output returned would be - 'prominence', 'performance', 'preform', 'provence', 'preferment', 'proforma'. PyEnchant Module For Windows users, install the pre-built binary packages using pip - pip ... Read More

This is very funny game. In this game no player is needed, it is an automatic game. Here we are using two Python modules numpy and random. In this game the mark on the board is put automatically instead of asking the user to put a mark on the board, and it will display the board after each turn unless a player wins. It returns -1 If the game gets draw. Example code import numpy as np import random from time import sleep # first creates an empty board def my_create_board(): return(np.array([[0, 0, 0], [0, ... Read More

Static C++ class members can be defined using the static keyword. The static member in a class is shared by all the class objects as there is only one copy of the static class member in the memory, regardless of the number of objects of the class.The static class member is initialized to zero when the first object of the class is created if it is not initialized in any other way.A program that demonstrates static class members in C++ is given as follows.Example Live Demo#include using namespace std; class Example {    public :    static int a;   ... Read More

In C/C++, a variable name can have alphabets, numbers, and the underscore( _ ) character. There are some keywords in the C/C++ language. Apart from them, everything is treated as an identifier. Identifiers are the names of variables, constants, functions, etc. Why Variables in C/C++ Can't Start with Numbers? In C and C++, variable names (also, known as identifiers) cannot start with a digit due to how the compiler processes code during compilation. First, we need to understand the phases of compilation or compiler. There are seven phases in a typical compiler: Lexical Analysis ... Read More

Variables can be declared as constant using the const keyword or the #define preprocessor directive. Details about these are given as follows.The const keywordVariables can be declared as constants by using the “const” keyword before the datatype of the variable. The constant variables can be initialized once only. The default value of constant variables are zero.A program that demonstrates the declaration of constant variables in C using const keyword is given as follows.Example Live Demo#include int main() {    const int a;    const int b = 12;    printf("The default value of variable a : %d", a);    printf("The ... Read More

In C language both the global and static variables must be initialized with constant values. This is because the values of these variables must be known before the execution starts. An error will be generated if the constant values are not provided for global and static variables.A program that demonstrates the initialization of global and static variables is given as follows.Example Live Demo#include int a = 5; static int b = 10; int main() {    printf("The value of global variable a : %d", a);    printf("The value of global static variable b : %d", b);    return 0; }OutputThe ... Read More

You can call a class member function using a NULL object pointer in C++. This is an undefined behavior and there is no guarantee about the execution of the program. The actual results depend on the compiler used. Class Member Function A class member function is a function that is defined either inside a class or outside a class using a scope resolution operator. Example Here is an example of class member functions in C++ where the print() function is an example of the Inside class function and the print2() function is ... Read More