js之数组的交集，补集，差集，并集

水深无声 2023-01-12 11:56 123阅读 0赞

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjMwNzI4Mw_size_16_color_FFFFFF_t_70][]

//两个数组的交集
    const intersectFn = (A= [], B= []) => {
                const intersection = A.filter( a => B.some( b=> b.id === a.id));
                console.log(intersection)
                return intersection
            };

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjMwNzI4Mw_size_16_color_FFFFFF_t_70 1][]

chajiFn(allArr =[], partArr = []){
                for (let i = allArr.length - 1; i >= 0; i--) {
                    for (let j = 0; j  < partArr.length; j++) {
                        if (allArr[i].Id === partArr[j].Id) {
                            allArr.splice(i, 1);
                            break;
                        }
                    }
                }
                return allArr;
            },

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjMwNzI4Mw_size_16_color_FFFFFF_t_70 2][]

let bingji = [...A,...B]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjMwNzI4Mw_size_16_color_FFFFFF_t_70 3][]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjMwNzI4Mw_size_16_color_FFFFFF_t_70 1]: /images/20221119/aa6981037c224b5b8257ace61ea034f1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjMwNzI4Mw_size_16_color_FFFFFF_t_70 2]: /images/20221119/76cd4200f58b42cc9800fb1b0b00fead.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjMwNzI4Mw_size_16_color_FFFFFF_t_70 3]: /images/20221119/264e731468ad47499f207435209fc20a.png