Setup eslint and enforce rules

src/util/support/Pipe.ts

@@ -45,15 +45,15 @@ export class Pipe<T> {
      * Return a new Pipe containing the given subject.
      * @param subject
      */
-    static wrap<subject_t>(subject: subject_t) {
-        return new Pipe<subject_t>(subject)
+    static wrap<subjectType>(subject: subjectType): Pipe<subjectType> {
+        return new Pipe<subjectType>(subject)
     }
 
     constructor(
         /**
          * The item being operated on.
          */
-        private subject: T
+        private subject: T,
     ) {}
 
     /**
@@ -68,7 +68,7 @@ export class Pipe<T> {
      *
      * @param op
      */
-    tap<T2>(op: PipeOperator<T, T2>) {
+    tap<T2>(op: PipeOperator<T, T2>): Pipe<T2> {
         return new Pipe(op(this.subject))
     }
 
@@ -79,7 +79,7 @@ export class Pipe<T> {
      * @param check
      * @param op
      */
-    when(check: boolean, op: ReflexivePipeOperator<T>) {
+    when(check: boolean, op: ReflexivePipeOperator<T>): Pipe<T> {
         if ( check ) {
             return Pipe.wrap(op(this.subject))
         }
@@ -94,7 +94,7 @@ export class Pipe<T> {
      * @param check
      * @param op
      */
-    unless(check: boolean, op: ReflexivePipeOperator<T>) {
+    unless(check: boolean, op: ReflexivePipeOperator<T>): Pipe<T> {
         return this.when(!check, op)
     }
 
@@ -103,7 +103,7 @@ export class Pipe<T> {
      * @param check
      * @param op
      */
-    whenNot(check: boolean, op: ReflexivePipeOperator<T>) {
+    whenNot(check: boolean, op: ReflexivePipeOperator<T>): Pipe<T> {
         return this.unless(check, op)
     }