File
    Implements
    
    
    
    
    
    
    
    
    
    
        
            
                | keys | 
                
                    | Default value : _.keys | 
                    
                        |  | 
        
    
        import { Component, OnInit } from '@angular/core';
import * as _ from 'lodash';
import { ChooserService } from '../shared/chooser.service';
@Component({
  selector: 'hi-helix-list',
  templateUrl: './helix-list.component.html',
  styleUrls: ['./helix-list.component.scss'],
})
export class HelixListComponent implements OnInit {
  groups: any;
  keys = _.keys;
  constructor(protected service: ChooserService) {}
  ngOnInit() {
    this.service.getAll().subscribe((data) => (this.groups = data));
  }
}
     
    
        <!--
  ~ Licensed to the Apache Software Foundation (ASF) under one
  ~ or more contributor license agreements.  See the NOTICE file
  ~ distributed with this work for additional information
  ~ regarding copyright ownership.  The ASF licenses this file
  ~ to you under the Apache License, Version 2.0 (the
  ~ "License"); you may not use this file except in compliance
  ~ with the License.  You may obtain a copy of the License at
  ~
  ~     http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing,
  ~ software distributed under the License is distributed on an
  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  ~ KIND, either express or implied.  See the License for the
  ~ specific language governing permissions and limitations
  ~ under the License.
  -->
<mat-card *ngFor="let group of keys(groups)">
  <mat-card-header>
    <mat-card-title>{{ group | titlecase }}</mat-card-title>
  </mat-card-header>
  <mat-card-content>
    <section *ngFor="let section of groups[group]" class="section">
      <a
        *ngFor="let helix of keys(section)"
        mat-button
        [routerLink]="['/', group + '.' + helix]"
      >
        <mat-icon>group_work</mat-icon>
        {{ helix }}
      </a>
    </section>
  </mat-card-content>
</mat-card>
     
    
                
                .section {
  padding-bottom: 20px;
  .mat-button {
    width: 150px;
    text-align: left;
  }
}
.mat-card-title {
  font-size: 20px;
}
     
    
        
        
            
                Legend
            
            
            
            
                Html element with directive