How to check if file exists in python / 4 ways to check if file exists in python
Many times a program tries to read from a file but the file has been removed or deleted from its location. Result is that the program crashes abnormally. Best way…
How to list all files in a directory in python / 3 ways to get files in directory in python
Many times we need to create a searching utility program which when provided a directory path lists all the files and sub-directories inside it. Python provides many utility functions to…
How to generate random string in java / 4 ways to generate random string in java
Generation of random sequence of characters is often required when you want to display a unique transaction id or as a random password generator which provides a temporary password for…
Enhanced for loop java
Enhanced for loop also called advanced for loop is used to iterate over an array or a collection of elements such as list or set. When a collection is iterated…
Method overriding in java
Method overriding means defining a method with the same name and same arguments in a child class as defined in a super(or parent) class. Remember that both number and type…
How to check if string contains another string in java
Many times we need to check if a string has a sequence of characters and take some action based on the result. Example, if you have a list of student…
How to toggle element display in angular / How to show hide div on button click in angular
Often it is required to show an element on click of a button or a link and hiding it again on click. In simpler words, toggle element display on each…
Kaprekar number
What is Kaprekar Number? A number whose square when divided into 2 parts and each part is added, the result is equal to the number itself is called Kaprekar number.…
Overloading in java
What is overloading Overloading means creating with the same name but different arguments. Arguments may differ in number or types. Either methods or constructors can be overloaded in java.…