Dynamically filter data in nested javascript object array [duplicate]

Question

I have a dynamic array var arr = ["key1","key2","key3"] i want to filter an array of objects with this array,for example,

var obj = [{"key1":{"key2":{"key3":5}}},{"key1":{"key2":{"key3":7}}},{"key1":{"key2":{"key3":8}}}]

with "key3" equals to 5. How can I achieve this with vanilla javascript?

what I want to check is obj.filter(e => e["key1"]["key2"]...etc = some_value); but the elements in the array can vary — vishnu v
– vishnu v, Commented Feb 6, 2020 at 12:28

Nina Scholz · Accepted Answer · 2020-02-06 12:28:02Z

1

You could reduce the keys with the object and return the value for checking.

var getValue = (keys, object) => keys.reduce((o, k) => o[k], object),
    keys = ["key1", "key2", "key3"],
    array = [{ key1: { key2: { key3: 5 } } }, { key1: { key2: { key3: 7 } } }, { key1: { key2: { key3: 8 } } }],
    result = array.filter(o => getValue(keys, o) === 5);

console.log(result);

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

answered Feb 6, 2020 at 12:28

Nina Scholz

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