第四天 Array Cardio Day 1
第四天的題目比較偏向於陣列的處理練習，可以用來複習自己對於陣列的處理方式熟不熟悉，我們直接來看看題目是什麼：

const inventors = [
      { first: 'Albert', last: 'Einstein', year: 1879, passed: 1955 },
      { first: 'Isaac', last: 'Newton', year: 1643, passed: 1727 },
      { first: 'Galileo', last: 'Galilei', year: 1564, passed: 1642 },
      { first: 'Marie', last: 'Curie', year: 1867, passed: 1934 },
      { first: 'Johannes', last: 'Kepler', year: 1571, passed: 1630 },
      { first: 'Nicolaus', last: 'Copernicus', year: 1473, passed: 1543 },
      { first: 'Max', last: 'Planck', year: 1858, passed: 1947 },
      { first: 'Katherine', last: 'Blodgett', year: 1898, passed: 1979 },
      { first: 'Ada', last: 'Lovelace', year: 1815, passed: 1852 },
      { first: 'Sarah E.', last: 'Goode', year: 1855, passed: 1905 },
      { first: 'Lise', last: 'Meitner', year: 1878, passed: 1968 },
      { first: 'Hanna', last: 'Hammarström', year: 1829, passed: 1909 }
    ];
    
const people = [
      'Bernhard, Sandra', 'Bethea, Erin', 'Becker, Carl', 'Bentsen, Lloyd', 'Beckett, Samuel', 'Blake, William', 'Berger, Ric', 'Beddoes, Mick', 'Beethoven, Ludwig',
      'Belloc, Hilaire', 'Begin, Menachem', 'Bellow, Saul', 'Benchley, Robert', 'Blair, Robert', 'Benenson, Peter', 'Benjamin, Walter', 'Berlin, Irving',
      'Benn, Tony', 'Benson, Leana', 'Bent, Silas', 'Berle, Milton', 'Berry, Halle', 'Biko, Steve', 'Beck, Glenn', 'Bergman, Ingmar', 'Black, Elk', 'Berio, Luciano',
      'Berne, Eric', 'Berra, Yogi', 'Berry, Wendell', 'Bevan, Aneurin', 'Ben-Gurion, David', 'Bevel, Ken', 'Biden, Joseph', 'Bennington, Chester', 'Bierce, Ambrose',
      'Billings, Josh', 'Birrell, Augustine', 'Blair, Tony', 'Beecher, Henry', 'Biondo, Frank'
    ];
//以上為作者給我們的陣列資料，不外乎就是陣列裡面包物件。

在Alex的影片中，新學到了一個除了console.log()之外的用法console.table()，這個方法可以讓資料排列整齊更好去閱讀。

Array.prototype.filter()
1. Filter the list of inventors for those who were born in the 1500's
//希望我們利用陣列方法裡面的`filter`找出inventors這串資料裡，誰是1500年出生的，這裡要注意的地方是1500年但又不能超過1600年，否則就不算是1500年出生的。
    let ans = inventors.filter(
    (inventors) => inventors.year > 1500 && inventors.year < 1600);
    console.table(ans);

Array.prototype.map()
2. Give us an array of the inventors first and last names
//得到一個陣列裡面有`inventors`的first和last name。
    let ans = inventors.man(inventor=>`${inventor.first} ${inventor.last}`)
    console.table(ans);

這邊稍微說明一下，題目有提到他要得到一個陣列，那我們就會使用陣列裡的map()方法，map跟forEach最大的不一樣地方在於，map我們會得到一個陣列，forEach不會。

Array.prototype.sort()
3. Sort the inventors by birthdate, oldest to youngest

Array.prototype.reduce()
4. How many years did all the inventors live all together?

5. Sort the inventors by years lived

6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris


7. sort Exercise
Sort the people alphabetically by last name

8. Reduce Exercise
Sum up the instances of each of these
const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck' ];