为cols添加新的摘要行，共享2个不同cols的相同价位 [英] Add new summary row for cols share the same vales of 2 different cols

问题描述

我有一个矩阵算法:

输入:

const input = [
    ['Camry', 'Toyota', 'Jan', 'Nowhere Town', '50'],
    ['Camry', 'Toyota', 'Feb', 'Nowhere Town', '70'],
    ['Camry', 'Toyota', 'Jan', 'Random City', '3000'],
    ['Prius', 'Toyota', 'Jan', 'Nowhere Town', '60'],
    ['Prius', 'Toyota', 'Jan', 'Random Town', '60'],
    ['Prius', 'Toyota', 'Mar', 'Nowhere Town', '50'],
    ['Civic', 'Honda', 'Jan', 'Nowhere Town', '10'],
    ['Civic', 'Honda', 'Feb', 'Nowhere Town', '10'],
    ['Civic', 'Honda', 'Mar', 'Random Town', '10'],
    ['Civic', 'Honda', 'Mar', 'Random Town', '20'],
]

预期输出:

const output = [
    ['S', 'Camry', 'Toyota', 'Jan', '3050'],
    ['D', 1, 'Camry', 'Nowhere Town', '50'],
    ['D', 2, 'Camry', 'Random City', '3000'],
    ['S', 'Camry', 'Toyota', 'Feb', '70'],
    ['D', 1, 'Camry', 'Nowhere Town', '70'],
    ['S', 'Prius', 'Toyota', 'Jan', '120'],
    ['D', 1, 'Prius', 'Nowhere Town', '60'],
    ['D', 2, 'Prius', 'Random Town', '60'],
    ['S', 'Prius', 'Toyota', 'Mar', '50'],
    ['D', 1, 'Prius', 'Nowhere Town', '50'],
    ['S', 'Civic', 'Honda', 'Jan', '10'],
    ['D', 1, 'Civic', 'Nowhere Town', '10'],
    ['S', 'Civic', 'Honda', 'Feb', '10'],
    ['D', 1, 'Civic', 'Nowhere Town', '10'],
    ['S', 'Civic', 'Honda', 'Mar', '20'],
    ['D', 1, 'Civic', 'Random Town', '10'],
    ['D', 2, 'Civic', 'Random Town', '10'],
]

用词: 如果行包含相同的品牌，相同的制造和相同的月份，则在总销售额的最前面添加一个摘要行，并为每个行添加列出的订单详细信息行.

In words: If rows contain the same Brand, the same Make and the same Month add a Summary Row on top with total sales and add listed order for each details row.

我有一个旧代码:

const groupReport = arr => {
    let grouped = [].concat(...arr.reduce((acc, cur) => {
        var data = acc.get(cur[1]) || [['P', cur[1], '0']]
        data.push(['D', data.length, cur[0], cur[3], cur[4]])
        data[0][2] = (+data[0][2] + +cur[4]).toString()
        return acc.set(cur[0], data);
    }, new Map)
    .values()
    )
    return grouped
}

它不起作用，因为它只比较一个col(品牌)，而不比较Make和Month.

It doesn't work since it only compares one col (Brand), not Make and Month.

推荐答案

您可以使用组合键和销毁数组.

You could use a combined key and a destructed array.

var array = [['Camry', 'Toyota', 'Jan', 'Nowhere Town', '50'], ['Camry', 'Toyota', 'Feb', 'Nowhere Town', '70'], ['Camry', 'Toyota', 'Jan', 'Random City', '3000'], ['Prius', 'Toyota', 'Jan', 'Nowhere Town', '60'], ['Prius', 'Toyota', 'Jan', 'Random Town', '60'], ['Prius', 'Toyota', 'Mar', 'Nowhere Town', '50'], ['Civic', 'Honda', 'Jan', 'Nowhere Town', '10'], ['Civic', 'Honda', 'Feb', 'Nowhere Town', '10'], ['Civic', 'Honda', 'Mar', 'Random Town', '10'], ['Civic', 'Honda', 'Mar', 'Random Town', '20']],
    result = [].concat(...array
        .reduce((m, [brand, make, month, town, amount]) => {
            var key = [brand, make, month].join('|'),
                data = m.get(key) || [['S', brand, make, month, '0']];

            data.push(['D', data.length, brand, town, amount]);
            data[0][4] = (+data[0][4] + +amount).toString();
            return m.set(key, data);
        }, new Map)
        .values()
    );

console.log(result.map(a => a.join(' ')));

.as-console-wrapper { max-height: 100% !important; top: 0; }

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