diff --git a/docs/collection/merge-with.md b/docs/collection/merge-with.md
index 8f35be0..aceea1d 100644
--- a/docs/collection/merge-with.md
+++ b/docs/collection/merge-with.md
@@ -7,19 +7,16 @@ Merge two objects recursively, allowing for custom merge logic through a callbac
 ```ts
 import { mergeWith } from 'rattail'
 
-mergeWith(
-  { a: [1, 2] }, { a: [3, 4] }, 
-  (objValue, srcValue) => [...objValue, ...srcValue]
-)
+mergeWith({ a: [1, 2] }, { a: [3, 4] }, (objValue, srcValue) => [...objValue, ...srcValue])
 // return: { a: [ 1, 2, 3, 4 ] }
 ```
 
 ### Arguments
 
-| Arg        | Type                                                                                      | Defaults |
-| ---------- | ----------------------------------------------------------------------------------------- | -------- |
-| `object`   | `object`                                                                                  |          |
-| `source`   | `object`                                                                                  |          |
+| Arg        | Type                                                                              | Defaults |
+| ---------- | --------------------------------------------------------------------------------- | -------- |
+| `object`   | `object`                                                                          |          |
+| `source`   | `object`                                                                          |          |
 | `callback` | `(objValue: any, srcValue: any, key: any, object: object, source: object) => any` |          |
 
 ### Return
diff --git a/docs/number/delay.md b/docs/number/delay.md
index b767f2b..4e0f2cd 100644
--- a/docs/number/delay.md
+++ b/docs/number/delay.md
@@ -14,8 +14,8 @@ console.log('End after 1 second')
 
 ### Arguments
 
-| Arg                   |   Type   | Defaults |
-| --------------------- | :------: | -------: |
+| Arg         |   Type   | Defaults |
+| ----------- | :------: | -------: |
 | `time (ms)` | `number` |          |
 
 ### Return
diff --git a/docs/zh/function/call.md b/docs/zh/function/call.md
index 56bd613..75d8275 100644
--- a/docs/zh/function/call.md
+++ b/docs/zh/function/call.md
@@ -7,9 +7,9 @@
 ```ts
 import { call } from 'rattail'
 
-call((a, b) => a + b, 1, 2) 
+call((a, b) => a + b, 1, 2)
 // return 3
-call([(a, b) => a + b, (a, b) => a + b], 1, 2) 
+call([(a, b) => a + b, (a, b) => a + b], 1, 2)
 // return [3, 3]
 ```
 
diff --git a/docs/zh/math/mean.md b/docs/zh/math/mean.md
index 93f2e2e..3cdbfbb 100644
--- a/docs/zh/math/mean.md
+++ b/docs/zh/math/mean.md
@@ -13,12 +13,12 @@ mean([10, 20, 30]) // return 20
 
 ### 参数列表
 
-| 参数  |    类型     | 默认值 |
-| ----- | :---------: | -----: |
-| `arr` | `number[]`  |        |
+| 参数  |    类型    | 默认值 |
+| ----- | :--------: | -----: |
+| `arr` | `number[]` |        |
 
 ### 返回值
 
-|   类型    |
-| :-------: |
-| `number`  |
\ No newline at end of file
+|   类型   |
+| :------: |
+| `number` |
diff --git a/src/math.ts b/src/math.ts
index 51c2d94..04158ed 100644
--- a/src/math.ts
+++ b/src/math.ts
@@ -13,7 +13,7 @@ export function minBy<T>(arr: T[], fn: (val: T) => number) {
     return
   }
 
-  return arr.reduce((result, item) => fn(result) < fn(item) ? result : item, arr[0])
+  return arr.reduce((result, item) => (fn(result) < fn(item) ? result : item), arr[0])
 }
 
 export function maxBy<T>(arr: T[], fn: (val: T) => number) {
@@ -21,7 +21,7 @@ export function maxBy<T>(arr: T[], fn: (val: T) => number) {
     return
   }
 
-  return arr.reduce((result, item) => fn(result) > fn(item) ? result : item, arr[0])
+  return arr.reduce((result, item) => (fn(result) > fn(item) ? result : item), arr[0])
 }
 
 export function mean(arr: number[]) {