Created
March 12, 2017 13:02
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| import {Map, List, Seq, Collection} from "immutable"; | |
| declare module "immutable" { | |
| module Collection { | |
| interface Collection<K, V> { | |
| concat(valuesOrCollections: Array<V>): Collection<K, V>; | |
| } | |
| } | |
| } | |
| console.error(List([1,2,3]) | |
| .flatMap(x => [x, 5]) | |
| .concat([7,8,9]) | |
| .flatMap(x => [x, 5])) |
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