fix funtion-partial export type (#507)

angus-c · Nov 19, 2022 · 1fe5e57 · 1fe5e57
1 parent 4636c2c
commit 1fe5e57
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Showing 2 changed files with 66 additions and 62 deletions.
diff --git a/packages/function-partial/index.d.ts b/packages/function-partial/index.d.ts
@@ -3,9 +3,10 @@ type Tail<T extends Array<any>> =
   ((...t: T) => void) extends (h: any, ...rest: infer R) => void ? R : never;
 
 /**
- * Return a list of Args such that the corresponding value is undefined. 
- * @example PartialArgs<[number, string, boolean], [number, undefined, undefined]> equals to [string, boolean]
- * @example PartialArgs<[number, string, ...boolean[]], [undefined, string]> 
+ * Return a list of Args such that the corresponding value is undefined.
+ * @example PartialArgs<[number, string, boolean], [number, undefined, undefined]>
+ *          equals to [string, boolean]
+ * @example PartialArgs<[number, string, ...boolean[]], [undefined, string]>
  *          equals to [number, ...boolean[]]
  */
 type PartialArgs<Args extends any[], Values extends any[], Output extends any[] = []>
@@ -15,5 +16,8 @@ type PartialArgs<Args extends any[], Values extends any[], Output extends any[]
   ? PartialArgs<Tail<Args>, Tail<Values>, [...Output, Args[0]]>
   : PartialArgs<Tail<Args>, Tail<Values>, Output>
 
-export function partial<Values extends any[], F extends (...args: any) => any>(func: F, ...args: Values)
+declare function partial<Values extends any[], F extends (...args: any) => any>
+  (func: F, ...args: Values)
   : (...args: PartialArgs<Parameters<F>, Values>) => ReturnType<F>
+
+export default partial
diff --git a/packages/function-partial/index.tests.ts b/packages/function-partial/index.tests.ts
@@ -1,106 +1,106 @@
-import { partial } from './index';
+import partial from './index';
 
 // Case 1) one aurgument.
-const sqrt = partial(Math.sqrt)
-sqrt(16)
+const sqrt = partial(Math.sqrt);
+sqrt(16);
 
 // @ts-expect-error
-sqrt()
+sqrt();
 // @ts-expect-error
-sqrt(2, 2)
+sqrt(2, 2);
 // @ts-expect-error
-sqrt(true)
+sqrt(true);
 
-const sqrtOf16 = partial(Math.sqrt, 16)
-sqrtOf16()
+const sqrtOf16 = partial(Math.sqrt, 16);
+sqrtOf16();
 
 // @ts-expect-error
-sqrtOf16(16)
+sqrtOf16(16);
 
 // Case 2) Two arguments.
 const repeat = (str: string, n: number) => {
-  return str.repeat(n)
-}
+  return str.repeat(n);
+};
 
-const anotherRepeat = partial(repeat)
-anotherRepeat("a", 2)
+const anotherRepeat = partial(repeat);
+anotherRepeat('a', 2);
 
 // @ts-expect-error
-anotherRepeat()
+anotherRepeat();
 // @ts-expect-error
-anotherRepeat("a")
+anotherRepeat('a');
 // @ts-expect-error
-anotherRepeat(2)
+anotherRepeat(2);
 // @ts-expect-error
-anotherRepeat(2, "a")
+anotherRepeat(2, 'a');
 
-const repeatHello = partial(repeat, "hello, ")
-repeatHello(10)
+const repeatHello = partial(repeat, 'hello, ');
+repeatHello(10);
 
 // @ts-expect-error
-repeatHello()
+repeatHello();
 // @ts-expect-error
-repeatHello([])
+repeatHello([]);
 
-const repeat3Times = partial(repeat, undefined, 3)
-repeat3Times('hello, ')
+const repeat3Times = partial(repeat, undefined, 3);
+repeat3Times('hello, ');
 
 // @ts-expect-error
-repeat3Times()
+repeat3Times();
 // @ts-expect-error
-repeat3Times({})
+repeat3Times({});
 
-const repeatHello3Times = partial(repeat, "hello, ", 3)
-repeatHello3Times()
+const repeatHello3Times = partial(repeat, 'hello, ', 3);
+repeatHello3Times();
 
 // @ts-expect-error
-repeatHello3Times(1, 2, 3)
+repeatHello3Times(1, 2, 3);
 
 // Case 3) three arguments.
 const getFormattedPrice = (amount: number, unit: string, includeTax: boolean) => {
-  const tax = includeTax ? 1.1 : 1
-  return `${unit}${amount * tax}`
-}
+  const tax = includeTax ? 1.1 : 1;
+  return `${unit}${amount * tax}`;
+};
 
-const anotherGetFormattedPrice = partial(getFormattedPrice)
-anotherGetFormattedPrice(100, "$", true)
+const anotherGetFormattedPrice = partial(getFormattedPrice);
+anotherGetFormattedPrice(100, '$', true);
 
 // @ts-expect-error
-anotherGetFormattedPrice({})
+anotherGetFormattedPrice({});
 
-const getFormattedPriceWithTax = partial(getFormattedPrice, undefined, undefined, true)
-getFormattedPriceWithTax(100, "€")
+const getFormattedPriceWithTax = partial(getFormattedPrice, undefined, undefined, true);
+getFormattedPriceWithTax(100, '€');
 
-const getFormattedPriceInUS = partial(getFormattedPrice, undefined, "$", undefined)
-getFormattedPriceInUS(100, false)
+const getFormattedPriceInUS = partial(getFormattedPrice, undefined, '$', undefined);
+getFormattedPriceInUS(100, false);
 
-const getFormattedCookiePrice = partial(getFormattedPrice, 100, undefined, undefined)
-getFormattedCookiePrice("$", false)
+const getFormattedCookiePrice = partial(getFormattedPrice, 100, undefined, undefined);
+getFormattedCookiePrice('$', false);
 
-const getFormattedCookiePriceInUS = partial(getFormattedPrice, 100, "$", undefined)
-getFormattedCookiePriceInUS(true)
+const getFormattedCookiePriceInUS = partial(getFormattedPrice, 100, '$', undefined);
+getFormattedCookiePriceInUS(true);
 
-const getFormattedCookiePriceWithoutTax = partial(getFormattedPrice, 100, undefined, false)
-getFormattedCookiePriceWithoutTax("¥")
+const getFormattedCookiePriceWithoutTax = partial(getFormattedPrice, 100, undefined, false);
+getFormattedCookiePriceWithoutTax('¥');
 
-const getFormattedPriceWithTaxInUS = partial(getFormattedPrice, undefined, "$", true)
-getFormattedPriceWithTaxInUS(10000)
+const getFormattedPriceWithTaxInUS = partial(getFormattedPrice, undefined, '$', true);
+getFormattedPriceWithTaxInUS(10000);
 
-const getFormattedCookiePriceWithTaxInUS = partial(getFormattedPrice, 100, "$", true)
-getFormattedCookiePriceWithTaxInUS()
+const getFormattedCookiePriceWithTaxInUS = partial(getFormattedPrice, 100, '$', true);
+getFormattedCookiePriceWithTaxInUS();
 
 // Case 4) arbitrarily many arguments.
-const consoleLog = partial(console.log)
-consoleLog("hello", ", ", "world")
+const consoleLog = partial(console.log);
+consoleLog('hello', ', ', 'world');
 
-const logHello = partial(console.log, "Hello")
-logHello()
+const logHello = partial(console.log, 'Hello');
+logHello();
 
-const logHelloWorld = partial(console.log, "Hello", ", ", "world")
-logHelloWorld()
+const logHelloWorld = partial(console.log, 'Hello', ', ', 'world');
+logHelloWorld();
 
-const logGreetWorld = partial(console.log, undefined, ", ", "world")
-logGreetWorld("Good Afternoon")
+const logGreetWorld = partial(console.log, undefined, ', ', 'world');
+logGreetWorld('Good Afternoon');
 
-const logGreetToSomeone = partial(console.log, undefined, ", ")
-logGreetToSomeone("Good Afternoon", "World", "!")
+const logGreetToSomeone = partial(console.log, undefined, ', ');
+logGreetToSomeone('Good Afternoon', 'World', '!');