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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | 5x 15x 4x 11x | // @flow
import type { Entry, Equals } from ".";
 
export default function singletonCache(equals: Equals) {
  let entry: Entry;
  return {
    get(key: any) {
      if (entry && equals(key, entry.key)) {
        return entry.value;
      }
    },
 
    put(key: any, value: any) {
      entry = { key, value };
    }
  };
}
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