CODEWITHSUNDEEP
javascriptarrays
Subha
Subha

Reputation: 761

how to create dynamic key and valuse in javascript array

Input JSON 

0===>{"eid":12,"gender":"1","age":1,"pass":["2","1"]}
1===>{"eid": 11,"gender":"0","age":1,"pass":["1","3"]}
2===>{"eid":20,"gender":"1","age":1,"pass":["2","3"]}

how to create new array.. to push the ids based on the pass numbers

Ex: IN a loop display

passid => 2 .... eid => 12, 20

2 ==> ["12","20"]
1 ==> [12, 11]
3 ==> [11,20]

Upvotes: 0

Views: 43

Answers (1)

Andy
Andy

Reputation: 63524

Use filter and some to check the contents of the pass array and then return the respective eid values:

function grabber(data, pass) {
    return data.filter(function (el) {
        return el.pass.some(function (num) {
            return +num === pass;
        })
    }).map(function (el) {
        return el.eid;
    });
}

grabber(data, 1); // [12, 11]
grabber(data, 2); // [12, 20]
grabber(data, 3); // [11, 20]

DEMO

UPDATE

Realised on the way home from work you don't actually need some. Further, to answer your comment, here's how you might search for pass and gender:

function grabber(data, options) {
    return data.filter(function (el) {
        return el.pass.indexOf(options.pass) > -1 && el.gender === options.gender;
    }).map(function (el) {
        return el.eid;
    });
}

grabber(data, { gender: '0', pass: '1' }); // [11]

DEMO

Upvotes: 2

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