1 files changed, 21 insertions, 0 deletions
diff --git a/src/lib/dict.ts b/src/lib/dict.ts
new file mode 100644
index 0000000..43b9f02
--- /dev/null
+++ b/src/lib/dict.ts
@@ -0,0 +1,21 @@
+type Key = string | number | symbol
+
+export function fromList<V>(xs: Array<{key: Key, value: V}>): Record<Key, V> {
+  let res: any = {}
+  xs.forEach(o => res[o.key] = o.value)
+  return res as Record<Key, V>
+}
+
+export function toList<V>(record: Record<Key, V>): Array<{key: Key, value: V}> {
+  return Object.keys(record)
+    .map(key => ({ key: key, value: record[key] }))
+}
+
+type EnumObject = {[key: string]: number | string};
+type EnumObjectEnum<E extends EnumObject> = E extends {[key: string]: infer ET | string} ? ET : never;
+
+export function values<E extends EnumObject>(enumObject: E): EnumObjectEnum<E>[] {
+  return Object.keys(enumObject)
+    .filter(key => Number.isNaN(Number(key)))
+    .map(key => enumObject[key] as EnumObjectEnum<E>)
+}