strchr in C : How to use strchr to print substring starting from a specific character : In this tutorial, we will learn what is strchr in C programming language and how to use it. We will show you with an example with explanation. strchr function can return the pointer to the first occurance of […]
C program to read the contents of a file character by character
C program to read the contents of a file character by character : In this tutorial, we will learn how to read contents of file in C programming language. You can modify the program to read contents from multiple files if you want. The program will read the contents character by character and it will […]
Button group in Bootstrap 4 : Explanation with example
How to use button group or group of buttons in Bootstrap 4 : Button-group or group of buttons can be created in bootstrap easily. Bootstrap comes with one inbuilt class called btn-group for displaying buttons in groups. We can create vertical or horizontal groups with different types of buttons. In this tutorial, we will mainly […]
How to check the type of a field in Mongo shell
Check the type of a field in Mongo shell : We can check the type of a field using Mongo shell. In this quick tutorial, I will show you how to do that. MongoDB provides two different operators for type checking: instanceof and typeof. Using these operators, we can either check if a field is […]
How to check if a number is perfect or not in Javascript
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 […]