diff --git a/src/boolean-util/boolean-util.spec.ts b/src/boolean-util/boolean-util.spec.ts
index 53662be..b98ae78 100644
--- a/src/boolean-util/boolean-util.spec.ts
+++ b/src/boolean-util/boolean-util.spec.ts
@@ -1,24 +1,24 @@
-import { valueOfBoolean } from './boolean-util';
+import { parseBoolean } from './boolean-util';
 
-describe('valueOfBoolean', () => {
+describe('parseBoolean', () => {
   it('should throw with incompatible input', () => {
-    expect(() => valueOfBoolean('abc')).toThrow();
-    expect(() => valueOfBoolean('1111')).toThrow();
-    expect(() => valueOfBoolean('')).toThrow();
-    expect(() => valueOfBoolean('nay')).toThrow();
+    expect(() => parseBoolean('abc')).toThrow();
+    expect(() => parseBoolean('1111')).toThrow();
+    expect(() => parseBoolean('')).toThrow();
+    expect(() => parseBoolean('nay')).toThrow();
   });
   it('should return parameter in boolean type', () => {
-    expect(valueOfBoolean('true')).toEqual(true);
-    expect(valueOfBoolean('false')).toEqual(false);
-    expect(valueOfBoolean('1')).toEqual(true);
-    expect(valueOfBoolean('0')).toEqual(false);
-    expect(valueOfBoolean('yes')).toEqual(true);
-    expect(valueOfBoolean('no')).toEqual(false);
-    expect(valueOfBoolean('Y')).toEqual(true);
-    expect(valueOfBoolean('N')).toEqual(false);
-    expect(valueOfBoolean('On')).toEqual(true);
-    expect(valueOfBoolean('Off')).toEqual(false);
-    expect(valueOfBoolean('TRUE')).toEqual(true);
-    expect(valueOfBoolean('FALSE')).toEqual(false);
+    expect(parseBoolean('true')).toEqual(true);
+    expect(parseBoolean('false')).toEqual(false);
+    expect(parseBoolean('1')).toEqual(true);
+    expect(parseBoolean('0')).toEqual(false);
+    expect(parseBoolean('yes')).toEqual(true);
+    expect(parseBoolean('no')).toEqual(false);
+    expect(parseBoolean('Y')).toEqual(true);
+    expect(parseBoolean('N')).toEqual(false);
+    expect(parseBoolean('On')).toEqual(true);
+    expect(parseBoolean('Off')).toEqual(false);
+    expect(parseBoolean('TRUE')).toEqual(true);
+    expect(parseBoolean('FALSE')).toEqual(false);
   });
 });
diff --git a/src/map-util/index.ts b/src/map-util/index.ts
index 7d7d987..2c51b2c 100644
--- a/src/map-util/index.ts
+++ b/src/map-util/index.ts
@@ -1 +1 @@
-export { getMapValue, groupBy, groupByKey } from './map-util';
+export { groupBy, groupByKey } from './map-util';
diff --git a/src/number-util/index.ts b/src/number-util/index.ts
index 6b24221..196c657 100644
--- a/src/number-util/index.ts
+++ b/src/number-util/index.ts
@@ -1,9 +1 @@
-export {
-  decimalRoundDown,
-  decimalRoundUp,
-  fromPermyriad,
-  intValueOf,
-  isNumeric,
-  toPermyriad,
-  valueOfNumber,
-} from './number-util';
+export { decimalRoundDown, decimalRoundUp, fromPermyriad, intValueOf, isNumeric, toPermyriad } from './number-util';
diff --git a/src/number-util/number-util.spec.ts b/src/number-util/number-util.spec.ts
index 71183b7..00fe3e8 100644
--- a/src/number-util/number-util.spec.ts
+++ b/src/number-util/number-util.spec.ts
@@ -1,12 +1,4 @@
-import {
-  decimalRoundDown,
-  decimalRoundUp,
-  fromPermyriad,
-  intValueOf,
-  isNumeric,
-  toPermyriad,
-  valueOfNumber,
-} from './number-util';
+import { decimalRoundDown, decimalRoundUp, fromPermyriad, intValueOf, isNumeric, toPermyriad } from './number-util';
 
 describe('intValueOf', () => {
   it('should throw with incompatible input', () => {
@@ -28,23 +20,6 @@ describe('intValueOf', () => {
   });
 });
 
-describe('valueOfNumber', () => {
-  it('should throw with incompatible input', () => {
-    expect(() => valueOfNumber('abc')).toThrow();
-    expect(() => valueOfNumber('4a')).toThrow();
-    expect(() => valueOfNumber('1.2.3')).toThrow();
-    expect(() => valueOfNumber('')).toThrow();
-  });
-  it('should return parameter in number type', () => {
-    expect(valueOfNumber('-1')).toEqual(-1);
-    expect(valueOfNumber('0')).toEqual(0);
-    expect(valueOfNumber('1.2')).toEqual(1.2);
-    expect(valueOfNumber('-1.2')).toEqual(-1.2);
-    expect(valueOfNumber('-93339.228883747849')).toEqual(-93339.22888374786);
-    expect(valueOfNumber('9488848.29000004833')).toEqual(9488848.290000048);
-  });
-});
-
 describe('isNumeric', () => {
   it('should equal to all', () => {
     expect(isNumeric('0')).toEqual(true);
diff --git a/src/string-util/string-util.ts b/src/string-util/string-util.ts
index cbd846e..0a6f599 100644
--- a/src/string-util/string-util.ts
+++ b/src/string-util/string-util.ts
@@ -168,7 +168,10 @@ export function isValidEmail(str: string): boolean {
 }
 
 export function splitTags(str: string, separator: string | RegExp = ','): Tag[] {
-  return str.split(separator).filter(_ => _.length).map((text) => ({ text: text.trim() }));
+  return str
+    .split(separator)
+    .filter((_) => _.length)
+    .map((text) => ({ text: text.trim() }));
 }
 
 /** @deprecated do .split().map().filter() yourself */
@@ -183,7 +186,7 @@ export function splitString(str: string, separator = ','): string[] {
 }
 
 export function joinTags(tags: Readonly<Tag[]>, separator = ','): string {
-  return tags.map((tag) => tag.text).join(separator)
+  return tags.map((tag) => tag.text).join(separator);
 }
 
 /** @deprecated do .map().join() yourself */