我需要过滤器数组长度javascript

Question

[
[
    {
        "support": 7,
        "items": [
            9
        ]
    },
    {
        "support": 7,
        "items": [
            8
        ]
    }
],
[
    {
        "support": 7,
        "items": [
            9
        ]
    },
    {
        "support": 5,
        "items": [
            10
        ]
    }
],
[
    {
        "support": 7,
        "items": [
            9
        ]
    },
    {
        "items": [
            2,
            9
        ],
        "support": 5
    }
],
[
    {
        "support": 7,
        "items": [
            9
        ]
    },
    {
        "items": [
            7,
            9
        ],
        "support": 5
    }
],
[
    {
        "support": 7,
        "items": [
            9
        ]
    },
    {
        "items": [
            8,
            9
        ],
        "support": 5
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "support": 5,
        "items": [
            1
        ]
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "support": 6,
        "items": [
            2
        ]
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "support": 5,
        "items": [
            4
        ]
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "support": 6,
        "items": [
            7
        ]
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "support": 7,
        "items": [
            8
        ]
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "support": 7,
        "items": [
            9
        ]
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "items": [
            2,
            9
        ],
        "support": 5
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "items": [
            7,
            9
        ],
        "support": 5
    }
],
[
    {
        "support": 5,
        "items": [
            10
        ]
    },
    {
        "items": [
            8,
            9
        ],
        "support": 5
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            1
        ]
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            2
        ]
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            4
        ]
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            7
        ]
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 7,
        "items": [
            8
        ]
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 7,
        "items": [
            9
        ]
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            10
        ]
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "items": [
            7,
            9
        ],
        "support": 5
    }
],
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "items": [
            8,
            9
        ],
        "support": 5
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            1
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            2
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            4
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            7
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 7,
        "items": [
            8
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 7,
        "items": [
            9
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            10
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "items": [
            2,
            9
        ],
        "support": 5
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "items": [
            8,
            9
        ],
        "support": 5
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            1
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            2
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            4
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            7
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 7,
        "items": [
            8
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 7,
        "items": [
            9
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 5,
        "items": [
            10
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "items": [
            2,
            9
        ],
        "support": 5
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "items": [
            7,
            9
        ],
        "support": 5
    }
]

]

result7 = newcom.filter(function (a) {
                        return a.some(function (b) {
                            return b.support && b.items.length == 2 || b.items.length == 1 && b.support;
                        });
                    });

在我的 json 之上，我尝试过滤项目以获得这样的结果，但失败了。是否有人对下面数组的结果有解决方案，以获取 [x, Y] 项和项 [x]，请帮助我。以上是我思考代码的结果，总是无法显示我想要的结果 在我的 json 之上，我试图过滤这些项目以获得这样的结果，但失败了。是否有人对下面数组的结果有解决方案，以获取 [x, Y] 项和项 [x]，请帮助我。以上是我思考代码的结果，总是无法显示我想要的结果

[
[
    {
        "items": [
            2,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            2
        ]
    }
],
[
    {
        "items": [
            7,
            9
        ],
        "support": 5
    },
    {
        "support": 6,
        "items": [
            7
        ]
    }
],
[
    {
        "items": [
            8,
            9
        ],
        "support": 5
    },
    {
        "support": 7,
        "items": [
            8
        ]
    }
]

]

Answer 1

结合条件使用filter。

const filter = (arr) =>
  arr.filter(
    ([xy1, xy2]) =>
      xy1.items.length === 2 &&
      xy2.items.length === 1 &&
      xy1.items[0] === xy2.items[0]
  );

const items = [
  [
    {
      support: 7,
      items: [9],
    },
    {
      support: 7,
      items: [8],
    },
  ],
  [
    {
      support: 7,
      items: [9],
    },
    {
      support: 5,
      items: [10],
    },
  ],
  [
    {
      support: 7,
      items: [9],
    },
    {
      items: [2, 9],
      support: 5,
    },
  ],
  [
    {
      support: 7,
      items: [9],
    },
    {
      items: [7, 9],
      support: 5,
    },
  ],
  [
    {
      support: 7,
      items: [9],
    },
    {
      items: [8, 9],
      support: 5,
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      support: 5,
      items: [1],
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      support: 6,
      items: [2],
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      support: 5,
      items: [4],
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      support: 6,
      items: [7],
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      support: 7,
      items: [8],
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      support: 7,
      items: [9],
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      items: [2, 9],
      support: 5,
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      items: [7, 9],
      support: 5,
    },
  ],
  [
    {
      support: 5,
      items: [10],
    },
    {
      items: [8, 9],
      support: 5,
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      support: 5,
      items: [1],
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      support: 6,
      items: [2],
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      support: 5,
      items: [4],
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      support: 6,
      items: [7],
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      support: 7,
      items: [8],
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      support: 7,
      items: [9],
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      support: 5,
      items: [10],
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      items: [7, 9],
      support: 5,
    },
  ],
  [
    {
      items: [2, 9],
      support: 5,
    },
    {
      items: [8, 9],
      support: 5,
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      support: 5,
      items: [1],
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      support: 6,
      items: [2],
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      support: 5,
      items: [4],
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      support: 6,
      items: [7],
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      support: 7,
      items: [8],
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      support: 7,
      items: [9],
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      support: 5,
      items: [10],
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      items: [2, 9],
      support: 5,
    },
  ],
  [
    {
      items: [7, 9],
      support: 5,
    },
    {
      items: [8, 9],
      support: 5,
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      support: 5,
      items: [1],
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      support: 6,
      items: [2],
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      support: 5,
      items: [4],
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      support: 6,
      items: [7],
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      support: 7,
      items: [8],
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      support: 7,
      items: [9],
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      support: 5,
      items: [10],
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      items: [2, 9],
      support: 5,
    },
  ],
  [
    {
      items: [8, 9],
      support: 5,
    },
    {
      items: [7, 9],
      support: 5,
    },
  ],
];

console.log(filter(items));