How to filter through an array of objects and list all objects containing a certain keyword in one o-CodePudding

I am working on an array of book objects and the task is to console.log a list of all books containin "companies" or "people" in their title.

const books = [{
    title: 'How to win friends and influence people',
    authors: ['Dale Carnegie'],
    publisher: 'Pocket Books',
    year: '1936'
  }, {
    title: 'Management: tasks, responsibilities, practices',
    authors: ['Peter F. Drucker'],
    publisher: 'Harper Business',
    year: '1985'
  }, {
    title: 'Strength finder 2.0',
    authors: ['Tom Rath'],
    publisher: 'Gallup Press',
    year: '2007'
  }, {
    title: 'In search of excellence: Lessons from America\'s best-run companies',
    authors: ['Thomas Peters', ' Robert H. Waterman'],
    publisher: 'Harper Collins',
    year: '1982'
  }, {
    title: 'Built to last: Successful habits of visionary companies',
    authors: ['James C. Collins', 'Jerry I. Porras'],
    publisher: 'Harper Collins',
    year: '1994'
  }, {
    title: 'Reengineering the corporation: A manifesto for business revolution',
    authors: ['Michael Hammer', 'James A. Champy'],
    publisher: 'Harper Collins',
    year: '1993'
  }, {
    title: 'Competitive advantage: Creating and sustaining superior performance',
    authors: ['Michael E. Porter'],
    publisher: 'Free Press',
    year: '1998'
  }, {
    title: 'Crossing the chasm: Marketing and selling technology products to mainstream customers',
    authors: ['Geoffrey A. Moore', 'Regis McKenna'],
    publisher: 'Pocket Books',
    year: '1936'
  }, {
    title: '7 habits of highly effective people: Powerful lessons in personal change',
    authors: ['Stephen R. Covey'],
    publisher: 'Simon and Shuster',
    year: '1990'
  }, {
    title: 'The Six Sigma Way',
    authors: ['Peter S. Pande et al', 'Robert P. Neuman', 'Roland R. Cavanagh'],
    publisher: 'McGraw Hill',
    year: '2000'
  }, {
    title: 'The innovator\'s dilemma: When new technologies cause great firms to fail',
    authors: ['Clayton M. Christensen'],
    publisher: 'Harvard Business School Press',
    year: '1997'
  }, {
    title: 'The Essential Drucker',
    authors: ['Peter F. Drucker'],
    publisher: 'Harper Business',
    year: '2001'
  }];

So far I've tried using filter() and includes() as per below, but it's only returning books that contain the keyword "people"

let keyWord = books.filter (bookTitle => bookTitle.title.includes('people'||'companies'));
console.log(keyWord);

CodePudding user response：

I'd suggest using Array.filter() along with Array.some() to match the desired result.

We create an array of keywords, then return any item that matches some of these.

const books = [{ title: 'How to win friends and influence people', authors: ['Dale Carnegie'], publisher: 'Pocket Books', year: '1936' }, { title: 'Management: tasks, responsibilities, practices', authors: ['Peter F. Drucker'], publisher: 'Harper Business', year: '1985' }, { title: 'Strength finder 2.0', authors: ['Tom Rath'], publisher: 'Gallup Press', year: '2007' }, { title: 'In search of excellence: Lessons from America\'s best-run companies', authors: ['Thomas Peters', ' Robert H. Waterman'], publisher: 'Harper Collins', year: '1982' }, { title: 'Built to last: Successful habits of visionary companies', authors: ['James C. Collins', 'Jerry I. Porras'], publisher: 'Harper Collins', year: '1994' }, { title: 'Reengineering the corporation: A manifesto for business revolution', authors: ['Michael Hammer', 'James A. Champy'], publisher: 'Harper Collins', year: '1993' }, { title: 'Competitive advantage: Creating and sustaining superior performance', authors: ['Michael E. Porter'], publisher: 'Free Press', year: '1998' }, { title: 'Crossing the chasm: Marketing and selling technology products to mainstream customers', authors: ['Geoffrey A. Moore', 'Regis McKenna'], publisher: 'Pocket Books', year: '1936' }, { title: '7 habits of highly effective people: Powerful lessons in personal change', authors: ['Stephen R. Covey'], publisher: 'Simon and Shuster', year: '1990' }, { title: 'The Six Sigma Way', authors: ['Peter S. Pande et al', 'Robert P. Neuman', 'Roland R. Cavanagh'], publisher: 'McGraw Hill', year: '2000' }, { title: 'The innovator\'s dilemma: When new technologies cause great firms to fail', authors: ['Clayton M. Christensen'], publisher: 'Harvard Business School Press', year: '1997' }, { title: 'The Essential Drucker', authors: ['Peter F. Drucker'], publisher: 'Harper Business', year: '2001' }];

const keyWords = ['people', 'companies'];

function findMatchingTitles(books, keyWords) { 
    return books.filter(({title}) => { 
        return keyWords.some(keyword => title.includes(keyword));
    })
}

console.log('Matching titles:');
const result = findMatchingTitles(books, ['people', 'companies']);
result.forEach(book => console.log(book.title));

.as-console-wrapper { max-height: 100% !important; top: 0; }

CodePudding user response：

Can't use OR operator inside include(). So you can write the logic outside.

books.filter(book => book.title.includes('companies') || book.title.includes('people'))

If match needs to be case insensitive:

books.filter(book => {
    const titleLower = book.title.toLowerCase()
    return titleLower.includes('companies') || titleLower.includes('people')
  })

CodePudding user response：

you can use regex:

const peopleRegex = /people/i
const companiesRegex = /companies/i

const result = books.filter(item=>peopleRegex.test(item.title) || companiesRegex.test(item.title))