JavaScript: Gather and display infromation from an object

Last update on May 30 2022 09:58:47 (UTC/GMT +8 hours)

JavaScript Object: Exercise-4 with Solution

Write a JavaScript program to display the reading status (i.e. display book name, author name and reading status) of the following books.

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Reading status of a book library</title>
</head>
<body>
</body>
</html>

JavaScript Code:

var library = [ 
    {
        title: 'Bill Gates',
        author: 'The Road Ahead',
        readingStatus: true
    },
    {
        title: 'Steve Jobs',
        author: 'Walter Isaacson',
        readingStatus: true
    },
    {
        title: 'Mockingjay: The Final Book of The Hunger Games',
        author: 'Suzanne Collins',
        readingStatus: false
    }];

for (var i = 0; i < library.length; i++) 
   {
    var book = "'" + library[i].title + "'" + ' by ' + library[i].author + ".";
    if (library[i].readingStatus) {
      console.log("Already read " + book);
    } else
    {
     console.log("You still need to read " + book);
    }
   }

Sample Output:

Already read 'Bill Gates' by The Road Ahead.
Already read 'Steve Jobs' by Walter Isaacson.
You still need to read 'Mockingjay: The Final Book of The Hunger Games' by Suzanne Collins.

Flowchart:

Live Demo:

See the Pen javascript-object-exercise-4 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04