However we can use couple of methods to do it. Delete ArrayĪrray has no built-in method to delete its items. Array // array of objects array.find(object => object.id = 2) // returns object with id 2 //array of numbers starting from 'zero' array.indexOf('one') // returns 1 as index Object // array of Objects // eg: [ 5. Let’s look at how we can find a particular element in all the four built-in javascript objects for different use-cases. And figured that I could write down my thoughts on the reasoning to choose a specific data-structure based on the type of operation that is required. Recently, I got the chance to work on a backbone application where I understood the primary importance of selectively using javascript built-in objects for our operations regardless of the framework. Effectively, the important part is the side effects of calling the function. Most of the times we pledge our allegiance to our lords (frameworks) and libraries and follow them blindly because we think that they are capable of doing everything, sometimes losing out on javascript best practices. forEach The forEach function is similar to the map, but instead of transforming the values and using the results, it runs the function for each element and discards the result.

(Oh! The Internet is the deep blue sea I was talking about).Īs frontend developers most of the times we do not rely on vanilla javascript for everything that we want. Although most of us do not venture all the way down into the darkness, we still precisely like to get what we want. You are on a boat in the middle of a deep blue sea.

a simple old-fashioned for loop - async-friendlyįor (let index = 0 index < theArray.The internet is a great place to find information, but there is one teeny-tiny problem.

forEach (ES5+ only spec | MDN) (or its relatives some and such) - not async-friendly (but see details).

a for-of loop (ES2015+ only spec | MDN) - simple and async-friendly.

For each javascript array of objects