使用lodash在JSON数组中使用多个键过滤多个值

Question

每次可能有动态不同的键值对要在不同数据中过滤时，我都有一个动态数据。我们如何用lodash中的多个键，值过滤它。我正在使用其过滤器功能，但结果无法实现。

示例数据：

    var data = [ {
  "VOTER" : 1012,
  "PARTY" : "REPUBLICAN",
  "PRECINCT" : 2408,
  "AGE_GROUP" : "71 +",
  "LAST_VOTED" : "08/2006",
  "YEARS_REG" : 51,
  "BALLOT_STATUS" : "PERM"
}, {
  "VOTER" : 1013,
  "PARTY" : "REPUBLICAN",
  "PRECINCT" : 2411,
  "AGE_GROUP" : "71 +",
  "LAST_VOTED" : "08/2006",
  "YEARS_REG" : 50,
  "BALLOT_STATUS" : "PERM"
}, {
  "VOTER" : 1014,
  "PARTY" : "DEMOCRAT",
  "PRECINCT" : 2424,
  "AGE_GROUP" : "71 +",
  "LAST_VOTED" : "08/2006",
  "YEARS_REG" : 50,
  "BALLOT_STATUS" : "PERM"
}, {
  "VOTER" : 1015,
  "PARTY" : "DEMOCRAT",
  "PRECINCT" : 2418,
  "AGE_GROUP" : "71 +",
  "LAST_VOTED" : "08/2006",
  "YEARS_REG" : 50,
  "BALLOT_STATUS" : "POLL"
    },{
  "VOTER" : 1109,
  "PARTY" : "AMERICAN INDEP",
  "PRECINCT" : 2404,
  "AGE_GROUP" : "71 +",
  "LAST_VOTED" : "08/2006",
  "YEARS_REG" : 34,
  "BALLOT_STATUS" : "POLL"
},{
  "VOTER" : 1111,
  "PARTY" : "DECLINED",
  "PRECINCT" : 2414,
  "AGE_GROUP" : "71 +",
  "LAST_VOTED" : "08/2006",
  "YEARS_REG" : 34,
  "BALLOT_STATUS" : "POLL"
}

]

过滤对象是：

var filterby = {"PARTY":["REPUBLICAN","DEMOCRAT"],"BALLOT_STATUS":["PERM","POLL"]}

来自lodash的过滤器功能：

var filtered_data = _.filter(data, filterby);

Answer 1

您可以使用纯Javascript并迭代filterBy的键和值。

var data = [{ VOTER: 1012, PARTY: "REPUBLICAN", PRECINCT: 2408, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 51, BALLOT_STATUS: "PERM" }, { VOTER: 1013, PARTY: "REPUBLICAN", PRECINCT: 2411, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 50, BALLOT_STATUS: "PERM" }, { VOTER: 1014, PARTY: "DEMOCRAT", PRECINCT: 2424, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 50, BALLOT_STATUS: "PERM" }, { VOTER: 1015, PARTY: "DEMOCRAT", PRECINCT: 2418, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 50, BALLOT_STATUS: "POLL" }, { VOTER: 1109, PARTY: "AMERICAN INDEP", PRECINCT: 2404, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 34, BALLOT_STATUS: "POLL" }, { VOTER: 1111, PARTY: "DECLINED", PRECINCT: 2414, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 34, BALLOT_STATUS: "POLL" }],
    filterBy = { PARTY: ["REPUBLICAN", "DEMOCRAT"], BALLOT_STATUS: ["PERM", "POLL"] },
    result = data.filter(function (o) {
        return Object.keys(filterBy).every(function (k) {
            return filterBy[k].some(function (f) {
                return o[k] === f;
            });
        });
    });

console.log(result);

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ES6

var data = [{ VOTER: 1012, PARTY: "REPUBLICAN", PRECINCT: 2408, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 51, BALLOT_STATUS: "PERM" }, { VOTER: 1013, PARTY: "REPUBLICAN", PRECINCT: 2411, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 50, BALLOT_STATUS: "PERM" }, { VOTER: 1014, PARTY: "DEMOCRAT", PRECINCT: 2424, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 50, BALLOT_STATUS: "PERM" }, { VOTER: 1015, PARTY: "DEMOCRAT", PRECINCT: 2418, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 50, BALLOT_STATUS: "POLL" }, { VOTER: 1109, PARTY: "AMERICAN INDEP", PRECINCT: 2404, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 34, BALLOT_STATUS: "POLL" }, { VOTER: 1111, PARTY: "DECLINED", PRECINCT: 2414, AGE_GROUP: "71 +", LAST_VOTED: "08/2006", YEARS_REG: 34, BALLOT_STATUS: "POLL" }],
    filterBy = { PARTY: ["REPUBLICAN", "DEMOCRAT"], BALLOT_STATUS: ["PERM", "POLL"] },
    result = data.filter(o => Object.keys(filterBy).every(k => filterBy[k].some(f => o[k] === f)));

console.log(result);

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