allow null default in toFloat and toInt (#134)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "radash",
-  "version": "9.0.0",
+  "version": "9.0.1",
   "description": "Functional utility library - modern, simple, typed, powerful",
   "main": "dist/cjs/index.cjs",
   "module": "dist/esm/index.mjs",

src/number.ts

@@ -1,15 +1,23 @@
-export const toFloat = (value: any, defaultValue: number = 0.0) => {
+export const toFloat = <T extends number | null = number>(
+  value: any,
+  defaultValue?: T
+): number | T => {
+  const def = defaultValue === undefined ? 0.0 : defaultValue
   if (value === null || value === undefined) {
-    return defaultValue
+    return def
   }
   const result = parseFloat(value)
-  return isNaN(result) ? defaultValue : result
+  return isNaN(result) ? def : result
 }
 
-export const toInt = (value: any, defaultValue: number = 0) => {
+export const toInt = <T extends number | null>(
+  value: any,
+  defaultValue?: T
+): number | T => {
+  const def = defaultValue === undefined ? 0 : defaultValue
   if (value === null || value === undefined) {
-    return defaultValue
+    return def
   }
   const result = parseInt(value)
-  return isNaN(result) ? defaultValue : result
+  return isNaN(result) ? def : result
 }

src/tests/number.test.ts

@@ -11,6 +11,10 @@ describe('number module', () => {
       const result = _.toFloat(undefined)
       assert.strictEqual(result, 0.0)
     })
+    test('uses null default', () => {
+      const result = _.toFloat('x', null)
+      assert.strictEqual(result, null)
+    })
     test('handles bad input', () => {
       const result = _.toFloat({})
       assert.strictEqual(result, 0.0)
@@ -25,6 +29,10 @@ describe('number module', () => {
       const result = _.toInt(null)
       assert.strictEqual(result, 0)
     })
+    test('uses null default', () => {
+      const result = _.toInt('x', null)
+      assert.strictEqual(result, null)
+    })
     test('handles undefined', () => {
       const result = _.toInt(undefined)
       assert.strictEqual(result, 0)