2023-08-31 js 笛卡尔积之商品规格组合

    let arr = [
        {
            name: '材质',
            value: ['花岗岩','玄武岩'],
        },
        {
            name: '体积',
            value: ['10克'],
        },
        {
            name: '颜色',
            value: ['白色'],
        },
    ];

[['花岗岩', '10克', '白色'],['玄武岩', '10克', '白色']]

function combineSpecs(specs) {
        if (specs.length === 0) {
            return [
                []
            ];
        } else {
            const [head, ...tail] = specs;
            const rest = this.combineSpecs(tail);
            const pairs = head.value.map(value => rest.map(r => [value, ...r]));
            return [].concat(...pairs);
        }
    };

    let arr = [
        {
            name: '材质',
            value: ['花岗岩','玄武岩'],
        },
        {
            name: '体积',
            value: ['10克'],
        },
        {
            name: '颜色',
            value: ['白色'],
        },
    ];

    let arr2 = this.combineSpecs(arr);
    console.log('最终结果',arr2);