基于其他数组限制检查数组的最有效方法

Question

我有以下一组数组，我想通过以下数组must_inculde, optional_include, must_not_include检查哪个数组满足条件

• 每个数组必须包含must_inculde的字母。
• 该数组不应包含任何must_not_include 。
• optional_include的值可以是must_inculde但它们不是必须的。

    my_arr = [['a', 'c', 'd', 'b', 'e'],
              ['a', 'e'],
              ['a', 'c', 'f'],
              ['a', 'c', 'b'],
              ['a', 'b', 'd'],
              ['a', 'b', 'd', 'c']]
    
    must_inculde = ['a', 'b']
    optional_include = ['c', 'd']
    must_not_include = ['f']

Answer 1

可选项并不有趣，因为数组永远不会因为这条信息而失败：如果它没有所有这些元素，那就没问题，如果有，也没关系。

所以你只需要检查includes和not-includes，为此你可以使用every和includes数组方法：

 let my_arr = [['a', 'c', 'd', 'b', 'e'], ['a', 'e'], ['a', 'c', 'f'], ['a', 'c', 'b'], ['a', 'b', 'd'], ['a', 'b', 'd', 'c']] let must_include = ['a', 'b'] let optional_include = ['c', 'd'] let must_not_include = ['f'] let result = my_arr.filter(arr => must_include.every(val => arr.includes(val)) && must_not_include.every(val => !arr.includes(val)) ); console.log(result);

Answer 2

这将为您提供一个带有true或false的镜像数组，用于“语句”：

 var my_arr = [['a', 'c', 'd', 'b', 'e'], ['a', 'e'], ['a', 'c', 'f'], ['a', 'c', 'b'], ['a', 'b', 'd'], ['a', 'b', 'd', 'c']]; var must_inculde = ['a', 'b']; var optional_include = ['c', 'd']; var must_not_include = ['f']; var mirror=my_arr.map(item=>({ must_inculde:must_inculde.reduce((acc,element)=>{acc=acc&&item.includes(element);return acc;},true), optional_include:item.some(element=>optional_include.includes(element)), must_not_include:!item.some(element=>must_not_include.includes(element)) })); console.log(mirror);

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