I'm trying to get data from an array and using map function to render content. Look at **{this.lapsList()}** and the associated **lapsList()** function to understand what I'm trying to do. The

On this page, you’ll use filter() and map() with React to filter and transform your array of data into an array of components. You will learn How to render components from an array using JavaScript’s map()

Apr 9, 2018 · I have an array that I need to map out in <Text>. This is what I've got in render() categories.map(category => <Text>{category.testHeader}</Text> But it doesn't print anything. I guess <Text> needs to be in render() right? So I tried …

Jan 4, 2020 · You need to add return in your map functions. What you return in your map function will be rendered. In your case you want to do this: note: you forgot it in both map functions so you will need to add it in both as in the example above. This was already mentioned in the comments, why do you post it as an answer?

Mar 30, 2019 · The map function is used to show a list of elements from an array. Properly saying, The map() method creates a new array with the results of calling a provided function on every element in the calling array.

Nov 13, 2017 · Array is used to store multiple values in a single object in react native. Array can hold infinite values(According to your requirement) in a single variable. So in this tutorial we would going to Create and Show Array Elements in Text component using MAP function.

First, let’s review how you transform lists in JavaScript. Given the code below, we use the map() function to take an array of numbers and double their values. We assign the new array returned by map() to the variable doubled and log it: This code logs [2, 4, 6, 8, 10] to the console.

Oct 10, 2024 · The map() function is a JavaScript array method that is often used to render lists in React and React Native. It works by looping over an array and creating elements for each item in the list.

Apr 10, 2023 · When you're working with React, you will often times need to render lists of items. With the map() method, you can create new results from your current lists or even showcase all the items in your lists. In this tutorial, you will learn how to use this method to access array contents in React.

Dec 28, 2024 · Today we will compare these three approaches, providing examples of their syntax and discussing their ideal use cases. 1. Using map() The map() function is a built-in JavaScript method for...