Javascript陣列篩選器按年份

Question

我正在嘗試過濾陣列

我不斷收回數組而不僅僅是過濾元素。我怎樣才能過濾元素？

 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 } 
 
    ]; 
 

 

 

 
    function isOldEnough(inventor) { 
 
     if(inventor.year >= 1500 && inventor.year <= 1600){ 
 
      return inventor; 
 
     } 
 
    } 
 

 
    inventors.filter(isOldEnough) 
 
    console.log(inventors);

Answer 1

filter不改變陣列，它不是返回一個包含只是匹配creteria項目的新數組。使用此：

var oldEnough = inventors.filter(isOldEnough); 

並請濾波功能清潔：

function isOldEnough(inventor) { 
    return inventor.year >= 1500 && inventor.year <= 1600; 
}