BREAKING: disallow fraq(1, 2) syntax, use fraq([1, 2]) instead

readme.md

@@ -40,17 +40,19 @@ const f5 = f4.div(f1).toString() // -> "6" (3 / 0.5)
 
 ## API
 
-### `fraq(...args: [Fraq] | [number, number])`
+```typescript
+type Fraq = Fraction | [number, number] | number | string
+```
+
+### `fraq(val: Fraq)`
 
 Helper function to create fraction from various inputs.
 
 ```typescript
-type Fraq = Fraction | [number, number] | number | string
-
-fraq(1, 2).toPair() // -> [1, 2]
 fraq(2).toPair() // -> [2, 1]
 fraq([2, 1]).toPair() // -> [2, 1]
 fraq(0.5).toPair() // -> [1, 2]
+fraq("1/2").toPair() // -> [1, 2]
 ```
 
 ### `new Fraction(n: number, d = 1, reduce = false)`
@@ -142,14 +144,14 @@ fraq(1, 2).eq([1, 3]) // -> false
 
 ```typescript
 fraq(0.5).toUnicode() // -> "1/2"
-fraq(1, 64).toUnicode() // -> "0"
-fraq(1, 64).toUnicode(64) // -> "1/64"
+fraq([1, 64]).toUnicode() // -> "0"
+fraq([1, 64]).toUnicode(64) // -> "1/64"
 ```
 
 ### `.toUnicode()`
 
 ```typescript
 fraq(0.5).toUnicode() // -> "½"
-fraq(1, 64).toUnicode() // -> "0"
-fraq(1, 64).toUnicode(64) // -> "¹⁄₆₄"
+fraq([1, 64]).toUnicode() // -> "0"
+fraq([1, 64]).toUnicode(64) // -> "¹⁄₆₄"
 ```

src/main.test.ts

@@ -40,7 +40,6 @@ test("should create fraction", () => {
   throws(() => new Fraction(3.1415, 1), /TypeError/i)
 
   equal(fraq([1, 2]).toPair(), [1, 2])
-  equal(fraq(1, 2).toPair(), [1, 2])
   equal(fraq(2).toPair(), [2, 1])
   equal(fraq(new Fraction(2)).toPair(), [2, 1])
 

src/main.ts

@@ -78,12 +78,12 @@ export const gcd = (a: number, b: number): number => {
   return a
 }
 
-export const fraq = (...args: [Fraq] | [number, number]): Fraction => {
-  if (args.length === 2) return new Fraction(...args)
-
-  let val = args[0]
+export const fraq = (val: Fraq): Fraction => {
   if (val instanceof Fraction) return val
-  if (Array.isArray(val)) return new Fraction(...val)
+  if (Array.isArray(val)) {
+    if (val.length !== 2) throw new Error("ValueError")
+    return new Fraction(...val)
+  }
 
   val = val.toString().trim()