Add noUnusedLocals to tsconfig to improve type checks.

src/array/range.pipe.ts

@@ -1,5 +1,4 @@
 import { Pipe, PipeTransform  } from '@angular/core';
-import { isArray } from '../utils/utils';
 
 @Pipe({
     name: 'range'

src/array/shuffle.pipe.ts

@@ -1,5 +1,5 @@
 import { Pipe, PipeTransform  } from '@angular/core';
-import { isArray, shuffle } from '../utils/utils';
+import { shuffle } from '../utils/utils';
 
 @Pipe({
     name: 'shuffle'

src/math/degrees.pipe.ts

@@ -4,7 +4,7 @@ import { isNumberFinite } from '../utils/utils';
 @Pipe({
     name: 'degrees'
 })
-export class DegreesPipe {
+export class DegreesPipe implements PipeTransform{
 
 
     transform (input: any): any {

src/math/radians.pipe.ts

@@ -1,10 +1,10 @@
 import { Pipe, PipeTransform } from '@angular/core';
-import { isNumberFinite, isInteger } from '../utils/utils';
+import { isNumberFinite } from '../utils/utils';
 
 @Pipe({
     name: 'radians'
 })
-export class RadiansPipe {
+export class RadiansPipe implements PipeTransform {
 
     transform (input: any): any {
 

src/math/random.pipe.ts

@@ -4,7 +4,7 @@ import { isNumberFinite } from '../utils/utils';
 @Pipe({
     name: 'random'
 })
-export class RandomPipe {
+export class RandomPipe implements PipeTransform {
 
     transform (input: any, min: number = 0, max: number = 1): any {
 

src/string/encode-uri-component.pipe.ts

@@ -4,7 +4,7 @@ import { isString } from '../utils/utils';
 @Pipe({
     name: 'encodeURIComponent'
 })
-export class EncodeURIComponentPipe {
+export class EncodeURIComponentPipe implements PipeTransform {
 
     transform (input: any) {
 

src/string/encode-uri.pipe.ts

@@ -4,7 +4,7 @@ import { isString } from '../utils/utils';
 @Pipe({
     name: 'encodeURI'
 })
-export class EncodeURIPipe {
+export class EncodeURIPipe implements PipeTransform {
 
     transform (input: any) {
 

src/string/repeat.pipe.ts

@@ -4,7 +4,7 @@ import { isString } from '../utils/utils';
 @Pipe({
     name: 'repeat'
 })
-export class RepeatPipe {
+export class RepeatPipe implements PipeTransform {
 
     transform (input: any, times: number = 1, characters: string = ''): any {
 

tsconfig.json

@@ -8,6 +8,7 @@
         "experimentalDecorators": true,
         "removeComments": false,
         "noImplicitAny": true,
+        "noUnusedLocals": true,        
         "suppressImplicitAnyIndexErrors": false,
         "declaration": true,
         "types": [