firebase integration in react

arr = [{x:1}, {x:3}] arr.reduce((accumulator, current) => accumulator + current.x, 0); Here is what the above code is Doing: 1. The reduce() method executes a reducer function (that you provide) on each element of the array, resulting in a single output value. 2. The reducer function takes four arguments: 1. Accumulator (acc) 2. Current Value…

const httpClient = new HttpClient(new HttpXhrBackend({ build: () => new XMLHttpRequest() })); Here is what the above code is Doing: 1. We’re creating a new HttpClient instance. 2. We’re passing in a new HttpXhrBackend instance. 3. We’re passing in a build function that returns a new XMLHttpRequest object. The HttpClient is the main class for…

docker build -t jdiquattro/node-web-app . Here is what the above code is Doing: 1. We’re using the FROM keyword to specify the base image we want to use. 2. We’re using the RUN keyword to run a command to install dependencies. 3. We’re using the COPY keyword to copy our application code into the container….

Here is what the above code is Doing: 1. Create a new text node with the value “old value” 2. Create a new script element 3. Append the text node to the script element 4. Append the script element to the document body 5. Change the text node’s value to “new value” The above code…

// Add follwoing cdn before end of body // Here is what the above code is Doing: 1. We are importing the html2pdf library. 2. We are selecting the div which needs to be downloaded as pdf. 3. We are calling the html2pdf function and passing the div as an argument.

let array = [“Chicago”, “Los Angeles”, “Calgary”, “Seattle”, ] // print the array console.log(array) //Adding a new item in an array without touching the actual array array.push(‘New Item’) < variable_name > .push( < What you want to add > ) //How many items does the array have? console.log(“This array has”, array.length, “things in it”) Here…