Question

searchBooks: Write a JavaScript function to find ALL the books in a 'library' written by a specific author. You should return:

• The list of the book titles as a string, with titles separated by a comma; OR
• 'NOT FOUND' if there is no match.
• Note that there should be no trailing comma and no additional space(s) surrounding the comma(s) - see the examples below for details.
  Example dataset, input and expected output:

  library = [ 
     { author: 'Bill Gates', title: 'The Road Ahead', libraryID: 1254},
     { author: 'Carolann Camilo', title: 'Eyewitness', libraryID: 32456},
     { author: 'Carolann Camilo', title: 'Cocky Marine', libraryID: 32457}  
    ];
  
  Input: [library, 'Bill Gates']
  Expected Output: 'The Road Ahead'
  
  Input: [library, 'Carolann Camilo']
  Expected Output: 'Eyewitness,Cocky Marine'
  
  Input: [library, 'Lala']
  Expected Output: 'NOT FOUND'

Answer 1

Here is the answer...

CODE:

function searchBooks(library, authorName) {

    var result="";

    var count=0;

    for(var i=0;i<library.length;i++){          //traverse array

        if(library[i].author==authorName){      //check if author present in list

            // console.log(library[i].author);

            if(count>=1)

                result+=",";                    //to add comma for if multiple values present

            result+=library[i].title;           //add to result variable

            count++;        

        }

    }

    if(result=="")

        return "NOT FOUND";

    return result;

}

library=[{author:'Bill Gates', title: 'The Road Ahead', libraryID:1254},

{ author: 'Carolann Camilo', title: 'The Way AHead', libraryID:1245},

{author:'Bill Gates', title: 'Second Book', libraryID:1255},

];

console.log(searchBooks(library,"Bill Gates"));

console.log(searchBooks(library,"Stark"));

console.log(searchBooks(library,"Carolann Camilo"));

OUTPUT:

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