JavaScript is a single-threaded or synchronous programming language but with promises we can make it look like multi-threaded or asynchronous programming language. Imagine a function waiting for a network request to complete which takes more time. Meanwhile entire execution freezes at that time we need asynchronous operations. Prior to promises, events and callback functions are …
In ECMA2015 generators are introduced in javascript. Functions in Javascript run until return or end. Generators run until yield or return or end. Generator is a process that can be passed and resumed and can yield multiple values. It provides a new way of working with functions and iterators. Using a generator: Regular function return …
Hoisting is a default behavior in JavaScript and not a feature. Here it allows us to use the variables and functions before declaring it. All the declarations of variables and functions are moved to the top of the scope. In other programming or scripting languages we cannot use a variable or function before declaring it. …
In JavaScript for checking equality or comparison we have two operators. Now the main difference between two operators is that == does type coercion before comparison but ==== does not convert and compares as it is. Type coercion: Type coercion is automatic or implicit conversion of one data type to another. It is similar to …
How to get the metadata of the OData service: https://services.odata.org/v4/northwind/northwind.svc/$metadata http://localhost:8080/sap/opu/odata/sap/ZOData_Service/$metadata How to get the no of records from the entity https://services.odata.org/v4/northwind/northwind.svc/Customers/$count http://localhost:8080/sap/opu/odata/sap/ZOData_Service/Customers/$count Here the entity mentioned in the URL is ‘Customers’. Customers is not case sensitive The above url will print out the no of records in the entity set Customers. How to get …
What are the important URI for OData model service Read More »
Steps to be followed:
When writing my previous article nullish coalescing operator, i learned about the differences between null and undefined. Before that i thought both are more or less same but after getting to know about falsy values in javascript. Now i know the difference between them. Null: In English the literal meaning of null is having no …
Javascript provides a double question mark operator (??) which is known as nullish coalescing operator. It is introduced in ES2020. It is a logical operator. According to MDN, nullish coalescing operator(??) is defined as “a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined and otherwise returns …
Why Javascript needs nullish coalescing operator? Read More »
Generally, in programming languages loops are useful in repeating a block of code. Loops are repeated set of actions which runs based on a condition. The loop continues to run until the condition returns a FALSE. The basic idea of loop is to save time and effort. To loop in javascript we have 7 statements …
Before ECMA6, we have to search through arrays using for loops. Now we have specific methods to search through arrays. Methods to search through arrays: Array.includes(): It returns a true if a value exists in an array otherwise false Syntax: fromIndex is optional. Default is 0. It determines from which index to begin comparison …
4 methods to search through arrays in JavaScript Read More »