I have an array of Map<string, number>
How can I flat to a single map?
Map<string, number>[] to Map<string, number>
Thank you
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With a loop? ...zerkms– zerkms2020-10-30 09:06:50 +00:00Commented Oct 30, 2020 at 9:06
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1Do you mind providing a sampled data here you're dealing with?Evaldas Buinauskas– Evaldas Buinauskas2020-10-30 09:06:55 +00:00Commented Oct 30, 2020 at 9:06
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what happens with duplicate keys?Aleksey L.– Aleksey L.2020-10-30 09:17:23 +00:00Commented Oct 30, 2020 at 9:17
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1 Answer
You can use Array.reduce and create a new Map with the result:
let map1 = new Map([['a', 1], ['b', 2]]);
let map2 = new Map([['c', 3], ['d', 4]]);
let maps = [map1, map2];
// reduce to a flattened array
let arr = maps.reduce((acc, val) => [...acc, ...val], []);
// create a new map using that array
let map3 = new Map(arr);
