filtering-articles-by-content.js

const articles = [
  {
    title: 'How to make an example',
    body: 'This tutorials shows you how to make a nice example. First Write some text!'
  },
  {
    title: 'My super frustrating personal blog entry',
    body: 'Im feeling so happy and angry and sad and glad and hungry and tired.'
  }
]

function analyze(articles) {

  return articles.map(article =>

    article = {
      ...article,
      score: {
        tutorial: ['how', 'tutorial']
          .some(word => article.body.toLowerCase().includes(word)) 
          ? 1 
          : 0,
        personal: ['happy', 'feeling']
          .some(word => article.body.toLowerCase().includes(word))
          ? 1 
          : 0    
      }
    
    }

  )

}

function categorize(articles) {

  return {
    tutorials: articles.filter(
      article => article.score.tutorial === 1 && article.score.personal === 0
    ),
    blogs: articles.filter(
      article => article.score.personal
    )
  }

}

console.log(
  categorize(analyze(articles))
)