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Page 2040 of 2109
How to make loops run faster using Python?
This is a language agnostic question. Loops are there in almost every language and the same principles apply everywhere. You need to realize that compilers do most heavy lifting when it comes to loop optimization, but you as a programmer also need to keep your loops optimized.It is important to realize that everything you put in a loop gets executed for every loop iteration. They key to optimizing loops is to minimize what they do. Even operations that appear to be very fast will take a long time if the repeated many times. Executing an operation that takes 1 microsecond ...
Read Morelist operator = in C++ STL
Given is the task to show the functionality list operator = function in C++ in STL.What is List in STL?List are containers that allow constant time insertion and deletion anywhere in sequence. List are implemented as doubly linked lists. List allow non-contiguous memory allocation. List perform better insertion extraction and moving of element in any position in container than array, vector and deque. In List the direct access to the element is slow and list is similar to forward_list, but forward list objects are single linked lists and they can only be iterated forwards.What is use of operator = ?This ...
Read MoreHow to find the value closest to negative infinity in Python?
Although infinity doesn't have a concrete representation, the closest number to negative infinity is represented as return value of float() function with '-inf' as argument>>> a=float('-inf') >>> -inf
Read MoreHow to find the value closest to positive infinity in Python?
Although infinity doesn't have a concrete representation, the closest number to infinity is represented as return value of float() function with 'inf' as argument>>> a=float('inf') >>> a inf
Read MoreHow to Find the Power of a Number Using Recursion in Python?
Following program accepts a number and index from user. The recursive funcion rpower() uses these two as arguments. The function multiplies the number repeatedly and recursively to return power.Exampledef rpower(num,idx): if(idx==1): return(num) else: return(num*rpower(num,idx-1)) base=int(input("Enter number: ")) exp=int(input("Enter index: ")) rpow=rpower(base,exp) print("{} raised to {}: {}".format(base,exp,rpow))OutputHere is a sample run −Enter number: 10 Enter index: 3 10 raised to 3: 1000
Read MoreHow to Multiply Two Matrices using Python?
Multiplication of two matrices is possible only when number of columns in first matrix equals number of rows in second matrix.Multiplication can be done using nested loops. Following program has two matrices x and y each with 3 rows and 3 columns. The resultant z matrix will also have 3X3 structure. Element of each row of first matrix is multiplied by corresponding element in column of second matrix.ExampleX = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] Y = [[10, 11, 12], [13, 14, 15], ...
Read MoreHow to Find Sum of Natural Numbers Using Recursion in Python?
If a function calls itself, it is called a recursive function. In order to prevent it from falling in infinite loop, recursive call is place in a conditional statement.Following program accepts a number as input from user and sends it as argument to rsum() function. It recursively calls itself by decrementing the argument each time till it reaches 1.def rsum(n): if n
Read MoreHow does modulus work with complex numbers in Python?
Floor and modulus operators (// and % respectively) are not allowed to be used on complex number in Python 3.x. However, these operations are defined for complex numbers in Python 2.7.xPython 3>>> x=9+2j >>> y=2+1j >>> x%y Traceback (most recent call last): File "", line 1, in x%y TypeError: can't mod complex numbers.Python 2.7>>> x=9+2j >>> y=2+1j >>> x%y (1-2j)Modulus of complex number operands returns their floor division multiplied by denominator>>> x-(x//y)*y (1-2j)
Read MoreWhat is vertical bar in Python bitwise assignment operator?
Vertical bar (|) stands for bitwise or operator. In case of two integer objects, it returns bitwise OR operation of two>>> a=4 >>> bin(a) '0b100' >>> b=5 >>> bin(b) '0b101' >>> a|b 5 >>> c=a|b >>> bin(c) '0b101'
Read MoreHow to start object-oriented programming in C++?
Object-oriented programming (OOP) is a programming paradigm based on the concept of "objects", which may contain data, in the form of attributes; and instructions to do things, in the form of methods.For example, a person is an object which has certain properties such as height, gender, age, etc. It also has certain methods such as move, talk, and so on.ObjectThis is the basic unit of object oriented programming. That is both data and function that operate on data are bundled as a unit called as object.ClassWhen you define a class, you define a blueprint for an object. This doesn't actually ...
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