fixes

ui-ngx/src/app/shared/components/device/gateway-connectors.component.ts

@@ -216,7 +216,7 @@ export class GatewayConnectorComponent extends PageComponent implements AfterVie
     if (attributesToDelete.length) {
       tasks.push(this.attributeService.deleteEntityAttributes(this.device, AttributeScope.SHARED_SCOPE, attributesToDelete));
     }
-    forkJoin(tasks).subscribe(resp => {
+    forkJoin(tasks).subscribe(_ => {
       this.showToast("Update Successful")
       this.updateData(true);
     })
@@ -327,7 +327,7 @@ export class GatewayConnectorComponent extends PageComponent implements AfterVie
           key: scope == AttributeScope.SHARED_SCOPE ? 'active_connectors' : 'inactive_connectors',
           value: scope == AttributeScope.SHARED_SCOPE ? this.activeConnectors : this.inactiveConnectors
         }]));
-        forkJoin(tasks).subscribe(resp => {
+        forkJoin(tasks).subscribe(_ => {
           if (this.initialConnector ? this.initialConnector.name === attribute.key : true) {
             this.clearOutConnectorForm();
             this.cd.detectChanges();
@@ -381,7 +381,7 @@ export class GatewayConnectorComponent extends PageComponent implements AfterVie
     }]), this.attributeService.saveEntityAttributes(this.device, AttributeScope.SERVER_SCOPE, [{
       key: 'inactive_connectors',
       value: this.inactiveConnectors
-    }]),]).subscribe(resp => {
+    }]),]).subscribe(_ => {
       this.updateData();
     })
   }

ui-ngx/src/app/shared/components/device/gateway-service-rpc.component.ts

@@ -14,7 +14,7 @@
 /// limitations under the License.
 ///
 
-import { AfterViewInit, ChangeDetectorRef, Component,  Input } from '@angular/core';
+import { AfterViewInit, Component,  Input } from '@angular/core';
 import { Store } from '@ngrx/store';
 import { AppState } from '@core/core.state';
 import { Router } from '@angular/router';

ui-ngx/src/app/shared/components/device/gateway-statistics.component.ts

@@ -39,6 +39,7 @@ import { PageLink } from '@shared/models/page/page-link';
 import { Direction, SortOrder } from '@shared/models/page/sort-order';
 import { MatTableDataSource } from '@angular/material/table';
 import { MatSort } from '@angular/material/sort';
+import { isNumber } from '@core/utils';
 
 
 @Component({
@@ -243,7 +244,7 @@ export class GatewayStatisticsComponent extends PageComponent implements AfterVi
   }
 
   private onDataUpdated() {
-    this.checkDataToBeNumeric();
+    this.isDataOnlyNumbers();
     if (this.isNumericData) {
       if (this.chartInited) {
         if (this.flot) {
@@ -263,13 +264,13 @@ export class GatewayStatisticsComponent extends PageComponent implements AfterVi
     this.flot.update();
   }
 
-  private checkDataToBeNumeric() {
+  private isDataOnlyNumbers() {
     if (this.general) {
       this.isNumericData = true;
       return;
     }
     this.dataSource.data = this.subscription.data.length ? this.subscription.data[0].data : [];
-    this.isNumericData = this.dataSource.data.every(data => isNaN(data[1]) === false);
+    this.isNumericData = this.dataSource.data.every(data => isNumber(data[1]));
   }
 
 
@@ -280,7 +281,7 @@ export class GatewayStatisticsComponent extends PageComponent implements AfterVi
     if (this.ctx.datasources[0].entity) {
       this.ctx.subscriptionApi.createSubscriptionFromInfo(widgetType.timeseries, subscriptionInfo, this.subscriptionOptions, false, true).subscribe(subscription => {
         this.subscription = subscription;
-        this.checkDataToBeNumeric();
+        this.isDataOnlyNumbers();
         this.legendData = this.subscription.legendData;
         this.flotCtx.defaultSubscription = subscription;
         this.resize$ = new ResizeObserver(() => {