Filtering multiple value with multiple key in json array using lodash

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一向
一向 2021-02-10 18:01

i have a dynamic data each time there could be dynamically different key value pair to be filtered in different data. how can we filter it with multiple key,value in lodash. i w

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  • 2021-02-10 18:34

    You could use plain Javascript and iterate the keys of the filterBy and the values.

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

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

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  • 2021-02-10 18:57

    _.filter method doesn't allow you to specify multiple options for filtering. Try with passing custom filter function:

    _.filter(data, function (item) {
      return ['REPUBLICAN', 'DEMOCRAT'].indexOf(item.PARTY) >= 0
          && ['PERM', 'POLL'].indexOf(item.BALLOT_STATUS) >= 0
    })
    
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  • 2021-02-10 18:57

    The _.filter function which iterates over elements of collection which is passes on first parameter in your case it's data and second parameter should be a function which is invoked per iteration for more info see Documentation.

    For this in your example you can use Arrow Functions

    Please find below snippet for more info.

    Change your filterby var as below

    var filterby = (m) => { return m => m.PARTY == "REPUBLICAN" || m.PARTY == "DEMOCRAT" && m.BALLOT_STATUS == "PERM" || m.BALLOT_STATUS == "POLL"  };
    

    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"
    }
    
    ]
    
    
    
    //var filterby = {"PARTY":["REPUBLICAN","DEMOCRAT"],"BALLOT_STATUS":["PERM","POLL"]}
    
    var filterby = (m) => { return m => m.PARTY == "REPUBLICAN" || m.PARTY == "DEMOCRAT" && m.BALLOT_STATUS == "PERM" || m.BALLOT_STATUS == "POLL"  };
    
    
    var filtered_data = _.filter(data, filterby);
    console.log(filtered_data);
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/lodash/4.17.4/lodash.min.js"></script>

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