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ecmascript-5

React: Which is recommended arrow or normal function?

November 3, 2022 by Magenaut

I started using arrow functions after I felt doing manual function/object bindings and scope related issues are headache but very rencently I came to know that it’s better to use normal function(ES5) than arrow function(ES6).

Categories Q&A, ReactJS Tags ecmascript-5, ecmascript-6, reactjs Leave a comment

Warning: Each child in an array or iterator should have a unique “key” prop

November 2, 2022 by Magenaut

G’Day.
I want to iterate over a bunch of JSON objects and turn them into React Elements. The objects look like this

Categories Q&A, ReactJS Tags ecmascript-5, ecmascript-6, javascript-objects, reactjs Leave a comment

Get values from arrays inside nested objects, compare and return the object

October 12, 2022 by Magenaut

I am trying to loop through a nested object that looks like this:

Categories Node.js, Q&A Tags arrays, ecmascript-5, javascript, node.js, object Leave a comment

Node.js Global eval, throwing ReferenceError

October 5, 2022 by Magenaut

I am trying to learn JavaScript from the Rhino book. I was trying to execute the following code from the book with regards to eval(). I am using node.js (v0.10.29) to execute the examples.

Categories Node.js, Q&A Tags ecmascript-5, eval, javascript, node.js, scope Leave a comment

Prototypical OO in JavaScript

October 4, 2022 by Magenaut

TL;DR:

Categories Node.js, Q&A Tags ecmascript-5, javascript, node.js, oop, prototypal-inheritance Leave a comment

Incrementing object id automatically JS constructor (static method and variable)

September 30, 2022 by Magenaut

I am newbie in JavaScript, I have an idea, to create class (function), I know how it works in JS (prototypes and so on), but I need to do something like incrementing Id in databases.

Categories Node.js, Q&A Tags closures, ecmascript-5, javascript, node.js, oop Leave a comment

Mixed default and named exports in Node with ES5 syntax

September 28, 2022 by Magenaut

All my experience with exporting/importing modules has come in ES6 using export and import, where you can do something like this to have a single module export a default function as well as separate named functions.

Categories Node.js, Q&A Tags ecmascript-5, javascript, node-modules, node.js Leave a comment

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