Javascript小型專案練習9 Array Cardio2(JS30-7)

今天繼續來做JS30~!這篇的內容跟第一次的陣列練習一樣，既簡單又簡短~!但還是得做個紀錄。一樣先附上程式碼!

Javascript

 // ## Array Cardio Day 2

    const people = [
      { name: 'Wes', year: 1988 },
      { name: 'Kait', year: 1986 },
      { name: 'Irv', year: 1970 },
      { name: 'Lux', year: 2015 }
    ];

    const comments = [
      { text: 'Love this!', id: 523423 },
      { text: 'Super good', id: 823423 },
      { text: 'You are the best', id: 2039842 },
      { text: 'Ramen is my fav food ever', id: 123523 },
      { text: 'Nice Nice Nice!', id: 542328 }
    ];

    // Some and Every Checks
    // Array.prototype.some() // is at least one person 19 or older?
    // Array.prototype.every() // is everyone 19 or older?
    let results = people.some(item => {
      2019 - item.year + 1 >= 19
    });
    results.length === 0 ? console.log("sry you brats") : console.log("At least one adult here");

    let results2 = people.every(item => 2019 - item + 1 >= 19);
    results2 ? console.log("Wow you all grow up") : console.log('Sry you brats');

    // Array.prototype.find()
    // Find is like filter, but instead returns just the one you are looking for
    // find the comment with the ID of 823423
    console.log(comments.find(item => item.id === 823423))

    // Array.prototype.findIndex()
    // Find the comment with this ID
    // delete the comment with the ID of 823423
    const index = comments.findIndex(item => item.id === 823423)
    console.log(comments[index].text); 

學習重點

• 複習find,some,every以及findIndex的用法

最終成果