JavaScript中的过滤关联数组与另一个数组
假设我们有两个这样的对象数组-
const data = [
{"XD_A":"XDL","XD_B_1":"38","XD_B_2":"PB"},
{"XD_A":"XDR","XD_B_1":"51","XD_B_2":"PB"},
{"XD_A":"XDL","XD_B_1":"58","XD_B_2":"PB"},
{"XD_A":"XDR","XD_B_1":"38","XD_B_2":"PB"},
{"XD_A":"XDL","XD_B_1":"76","XD_B_2":"PB"},
{"XD_A":"XDR","XD_B_1":"38","XD_B_2":"PB"}
];
const filters =[{"XD_A":"XDR"},{"XD_B_1":"38"}];我们需要编写一个JavaScript函数，该函数分别采用两个这样的数组作为第一个和第二个参数。
然后，该函数应仅从第一个数组（数据数组）中选择那些包含第二个数组（过滤器数组）中所有键值对的对象。
函数应该将所有这些对象推入一个新对象并返回该对象。
对于上面的数组，返回的数组应恰好包含两个这样的对象-
const output = [
{"XD_A":"XDR","XD_B_1":"38","XD_B_2":"PB"},
{"XD_A":"XDR","XD_B_1":"38","XD_B_2":"PB"}
];示例
为此的代码将是-
const data = [
{"XD_A":"XDL","XD_B_1":"38","XD_B_2":"PB"},
{"XD_A":"XDR","XD_B_1":"51","XD_B_2":"PB"},
{"XD_A":"XDL","XD_B_1":"58","XD_B_2":"PB"},
{"XD_A":"XDR","XD_B_1":"38","XD_B_2":"PB"},
{"XD_A":"XDL","XD_B_1":"76","XD_B_2":"PB"},
{"XD_A":"XDR","XD_B_1":"38","XD_B_2":"PB"}
];
const filters =[{"XD_A":"XDR"},{"XD_B_1":"38"}];
const filter = (data, filters) => {
return data.filter(e => {
try{
filters.forEach(o => {
Object.keys(o).forEach(key => {
if(e[key] !== o[key]) throw new 1;
});
});
return true;
}
catch(e){
return false;
}
});
}
console.info(filter(data, filters));输出结果
控制台中的输出将是-
[
{ XD_A: 'XDR', XD_B_1: '38', XD_B_2: 'PB' },
{ XD_A: 'XDR', XD_B_1: '38', XD_B_2: 'PB' }
]