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Виталий Шебаниц
Asked:2020-03-14 20:37:25 +0000 UTC2020-03-14 20:37:25 +0000 UTC

一行需要澄清

  • 772

我不明白，我在互联网上找不到字符串是如何工作的var exp = (o>4), o = o%5, str = pangrams[+exp][o];。解释 - 谁知道，以及如何谷歌？

var pangrams = [ 
  // not pangrams:
    [ 
      "This isn't a pangram!",
      "abcdefghijklmopqrstuvwxyz ",
      "aaaaaaaaaaaaaaaaaaaaaaaaaa",
      "Detect Pangram",
      "A pangram is a sentence that contains every single letter of the alphabet at least once."
    ],
  
  // pangrams:
    [
      "Cwm fjord bank glyphs vext quiz",
      "Pack my box with five dozen liquor jugs.",
      "How quickly daft jumping zebras vex.",
      "ABCD45EFGH,IJK,LMNOPQR56STUVW3XYZ",
      "AbCdEfGhIjKlM zYxWvUtSrQpOn"
    ]
  ];

[0,1,2,3,4,5,6,7,8,9].forEach(function(o){
  var exp = (o>4), o = o%5, str = pangrams[+exp][o]; // как работает дання строка и что она делает?
  console.log(str);
});

javascript

2 个回答

  1. Best Answer
      // parameter o (array item) is 6
  var exp = o > 4; // exp is true
  o = o % 5; // o is 1
  var str = pangrams[exp? 1 : 0][o]; // str is "Pack my box with five dozen liquor jugs.",
    • 2

  2. exp = (o>4)- exp 返回真或假，取决于 o 是否大于 4。

    o = o%5- 计算除法的余数。

    str = pangrams[+exp][o]- 将exp转换为数值0或1，然后pangrams根据指定的键exp和o将数组元素返回给str。

    • 2

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