Books.find(
{ "authors": { "$regex": "Alex", "$options": "i" } },
function(err,docs) {
}
);
Here is what the above code is Doing:
1. We’re using the find() method to search for all documents in the books collection.
2. We’re using the $regex operator to find all documents where the authors field contains the string “Alex”.
3. We’re using the $options operator to make the search case insensitive.
import React, { useEffect, useRef } from “react”; const MyComponent = () => { const myContainer = useRef(null); useEffect(() => { console.log(“myContainer..”, myContainer.current); }); return ( Ref with react I can use the DOM with react ref ); }; export default MyComponent; Here is what the above code is Doing: 1. We create a ref…
const vowelsArray = “aeiou”.split(“”); Here is what the above code is Doing: 1. We’re creating a variable called vowelsArray and assigning it to the string “aeiou” split into an array. 2. We’re creating a variable called consonantsArray and assigning it to the string “bcdfghjklmnpqrstvwxyz” split into an array.
##When you download after you need to install all package in package.json > npm install –save ##then you need to start another terminal > npm start — –reset-cache / npm start / react-native start ##It’s for starting your bundle, finally you can run your project > react-native run-android Here is what the above code is…
canvas.width = canvas.height * (canvas.clientWidth / canvas.clientHeight); Here is what the above code is Doing: 1. We’re creating a new canvas element and appending it to the body of the page. 2. We’re setting the width and height of the canvas to be the same as the width and height of the browser window. 3….
// Try adding flexGrow: 0 to your FlatList style } style={{flexGrow:0}} /> Here is what the above code is Doing: 1. The FlatList component is a generic scrolling container that can host multiple components. 2. The data prop is where you provide an array of the items you want to render in the list. 3….
//you will need to retrieve the ref at your constructor using React.createRef: //At constructor function: this.myTextInput = React.createRef(); //At render function: //And then you can call this.myTextInput.current.clear(); Here is what the above code is Doing: 1. We create a ref by calling React.createRef and assign it to a class property. 2. We pass the ref…