How to check if a number is perfect or not in Javascript : A positive integer is called a perfect number if the sum of its proper divisors excluding the number is equal to that number. That means, it is half of the sum of all the positive divisors including the number. For example, 6 […]
How to remove element from an array in Javascript
Remove an element from an array in Javascript : Most of the time we need to manipulate array objects like removing an element from an array. We can either remove an element and change the original array or we can create one different array by changing the original. There are several ways to remove one […]
How to reverse a string in Javascript in one line
How to reverse a string in Javascript in one line : As we know, string is immutable, so if we need to reverse a string, we can’t just change the position of all characters. In this tutorial, we will learn how to reverse a string in Javascript. I will show you the exact steps required […]
Create a button programmatically in iOS using Swift 4
How to create a button programmatically in iOS Swift 4 : Sometimes, we need to create UI elements programmatically in iOS projects. Creating elements dynamically has many advantage and disadvantages. We are not going to discuss that today. In this tutorial, we will learn how to create one UIButton programmatically. We will also learn how […]
Python program to replace single or multiple character,substring in a string
Python tutorial to replace a single or multiple character or substring in a string : In this tutorial, we will learn how to replace single or multiple characters in a string in python. For example, if you want to replace all ‘l’ with ‘#’ in ‘Hello World’, it will become ‘He##o Wor#d’. Python has one […]
Python program to remove all occurrence of a value from a list
Python: remove all occurrence of a value from a list : In this tutorial, we will learn how to remove all occurrence of a value from a list in python. For example, if the list is [1,1,2] and if we will remove all occurrence of 1, it will become [2]. I will show you two […]
Python program to iterate over the list in reverse order
In this tutorial, we will learn how to iterate over a list in reverse order. For example, if we have a list [1,2,3,4,5], we will traverse it in the order 5->4->3->2->1. We have different ways to traverse a list in reverse order. This iteration will not change the order of the list and we will […]
Python issubclass function in details
issubclass() function in python : In python, issubclass() function is used to check if a class is a subclass of another class. The syntax of the function is : issubclass(B,A) It will return one boolean value. True if class B is a subclass or derived class of class A, False otherwise. We can also send […]
Python isinstance() and issubclass() functions
Python isinstance() and issubclass() functions : Most of us confused with isinstance() and issubclass() functions in python. isinstance() is used to check if an object is an instance of a certain class or any of its subclass. Again, issubclass() is used to check if a class type is subclass of a different class. isinstance(object, classinfo) […]
Python program to find out numbers in a list divisible by two numbers
Introduction : In this python programming tutorial, we will learn how to find all numbers that are divisible by two specific numbers. For example, let’s take a look at the list [1,2,3,4,5]. In this list, numbers that are divisible by 2 and 1 are [2,4]. Our program will do the same thing. The user will […]