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Made a function to retrieve enum entries
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27
src/utils/enum/enum-entry.ts
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27
src/utils/enum/enum-entry.ts
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import { isReadOnlyMap } from "@/utils/collections";
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import { EnumKey, enumKeys } from "./enum-key";
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import { EnumValue } from "./enum-value";
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/**
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* Represents an entry in an enum, where the first element is the key and the second element is the value.
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*
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* @template T - Type of the enum.
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*/
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export type EnumEntry<T> = [EnumKey<T>, EnumValue<T>];
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/**
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* Retrieves an array of the entries of the specified `enum` object.
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*
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* @template T - Type of the enum.
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*
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* @param e - The enum object to retrieve the entries for.
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*
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* @returns An array of the entries of the specified `enum` object.
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*/
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export function enumEntries<T>(e: T): [EnumKey<T>, EnumValue<T>][] {
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if (isReadOnlyMap<EnumKey<T>, EnumValue<T>>(e)) {
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return [...e.entries()];
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}
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return enumKeys(e).map(key => [key, e[key]]);
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}
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38
tests/unit/utils/enum/enum-entry.spec.ts
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38
tests/unit/utils/enum/enum-entry.spec.ts
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import { Enum } from "@/utils/enum/enum";
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import { enumEntries } from "@/utils/enum/enum-entry";
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describe("enumEntries", () => {
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test("returns the correct entries for number-based built-in enums", () => {
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enum NumberEnum {
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A = 1,
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B = 2,
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C = 3,
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}
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const entries = enumEntries(NumberEnum);
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expect(entries).toEqual([["A", 1], ["B", 2], ["C", 3]]);
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});
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test("returns the correct entries for string-based built-in enums", () => {
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enum StringEnum {
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A = "a",
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B = "b",
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C = "c",
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}
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const entries = enumEntries(StringEnum);
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expect(entries).toEqual([["A", "a"], ["B", "b"], ["C", "c"]]);
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});
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test("returns the correct entries for custom enums created with Enum.create", () => {
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const CustomEnum = Enum.create({
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A: 1n,
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B: 2n,
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C: 3n,
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});
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const entries = enumEntries(CustomEnum);
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expect(entries).toEqual([["A", 1n], ["B", 2n], ["C", 3n]]);
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});
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});
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