isLetter method in java with example
isLetter method belongs to java.lang.Character class. It is a static method which takes a character as argument and tells if it is a letter or not. A letter here means…
switch case statement in java with example
What is switch statement A switch statement is a decision making statement in which one or more block of statements are executed according to a matching condition. It may be…
Check if object is empty javascript
A javascript object is a collection of properties in key-value pairs. An empty object means an object which does not contain any property. To know about javascript objects, refer this…
How to add element to array in javascript
Adding elements to an array is required when the items to be added are dynamic, may be they are received from the server or an http request to a URL…
How to check if a key exists in an object in javascript
If some property with a given key is accessed in the object and it is not present, then an error is raised. Thus before accessing the property, it is recommended…
Variable scope in javascript
What is scope Scope of a variable determines the areas where the variable will be accessible. Accessing a variable from a location which is outside its scope raises an error.…
How to check if a checkbox is checked using jQuery / javascript
Many times we need to show or hide an element based on the current state of a checkbox and for that we should first check whether the checkbox is checked…
How to remove an item from array in javascript
An array is a collection of values enclosed between square brackets in javascript. It is possible to create an array with pre-defined values and also add values to the array…
Ternary operator in java with example
What is ternary operator Literal meaning of ternary is three. As the name suggests, a ternary operator is an operator which has three operands. First of these three operands is…