打字稿：从变量

Question

只打印字符串编码离子框架2.

我有一个locationtracker，那是给我一个人的确切经纬度。

我想只有从storeArray打印的字符串，而不是等式中的数字。

如何从变量中忽略数字并只打印商店名称？

this.storeArray = [distValby, distKbhK, distRoskilde]; 
    this.storeArray.sort(); 

默认排序按最低数量。

相当新的离子2和打字稿。

谢谢！

import { StoreLocation } from '../../providers/store-location'; 
 
import { Component, OnInit } from '@angular/core'; 
 
import { NavController } from 'ionic-angular'; 
 
import { LocationTracker } from '../../providers/location-tracker'; 
 

 
@Component({ 
 
    selector: 'page-location', 
 
    templateUrl: 'location.html' 
 
}) 
 

 
export class LocationPage implements OnInit{ 
 

 
    public usrStoreLat: any; 
 
    public usrStoreLong: any; 
 
    public usrDistance: any; 
 
    public storeArray: Array<any> = []; 
 

 
    public roskilde: StoreLocation = new StoreLocation("Bagel Roskilde", "Trekroner st. 4", 55.650107, 12.131997, null); 
 
    public valby: StoreLocation = new StoreLocation("Bagel Valby", "Valby Langgade 12", 55.668071, 12.497865, null); 
 
    public kbhK: StoreLocation = new StoreLocation("Indre København", "Axeltorv 5, 1609 København V", 55.6887527, 12.5404156, null); 
 

 
    constructor(public navCtrl: NavController, public locationTracker: LocationTracker) { 
 
    } 
 

 
    // START GEO TRACKING FOR NUVÆRENDE POSITION 
 

 
    ngOnInit(){ 
 
    this.start(); 
 
    } 
 

 
    public start(){ 
 
    \t this.locationTracker.startTracking(); 
 
    this.usrStoreLat = this.locationTracker.lat; 
 
    this.usrStoreLong = this.locationTracker.lng; 
 

 
    
 
    if(this.locationTracker.lat != null){ 
 
    console.log('Tracker nu!'); 
 
    console.log('person lokation lat:' + this.usrStoreLat); 
 
    console.log('person lokation long:' + this.usrStoreLong); 
 
    this.calculateDist(); 
 
    } 
 
    } 
 

 

 
    public calculateDist(){ 
 
    var distRoskilde = ((this.usrStoreLat-this.roskilde.lat)+(this.usrStoreLong-this.roskilde.long)) + this.roskilde.name; 
 
    var distValby  = ((this.usrStoreLat-this.valby.lat)+(this.usrStoreLong-this.valby.long)) + this.valby.name; 
 
    var distKbhK  = ((this.usrStoreLat-this.kbhK.lat)+(this.usrStoreLong-this.kbhK.long)) + this.kbhK.name; 
 

 
    this.storeArray = [distValby, distKbhK, distRoskilde]; 
 
    this.storeArray.sort(); 
 
    
 
    console.log('se:' + typeof(this.storeArray[0]) + this.storeArray[0].toString());  
 
    // console.log('store arrayet:' + this.storeArray[0]); 
 
    } 
 

 
    stop(){ 
 
    \t this.locationTracker.stopTracking(); 
 
    } 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> 
 
<ion-header> 
 
\t <ion-navbar> 
 
\t <ion-title> 
 
\t  Location Tracker 
 
\t </ion-title> 
 
\t </ion-navbar> 
 
</ion-header> 
 

 
<ion-content> 
 
\t <h4>Current Latitude: {{locationTracker.lat}}</h4> 
 
\t <h4>Current Longitude: {{locationTracker.lng}}</h4> 
 

 
\t \t <p> Tætteste butik: {{this.storeArray[0]}} </p> 
 

 
\t <button ion-button full primary (click)="start()">Find nærmeste butik</button> 
 
\t <button ion-button full primary (click)="stop()">Stop Tracking</button> 
 
</ion-content>

Answer 1

而是节约的距离和名字一起作为一个字符串，你应该为每个“存储”对象。

首先，计算距离不添加名称：

var distRoskilde = ((this.usrStoreLat-this.roskilde.lat) + 
    (this.usrStoreLong-this.roskilde.long)); 

然后创建使用对象的数组，像这样：现在

this.storeArray = [{dist: distRoskilde, name: this.rokslide.name}, 
    {dist: distValby, name: this.valby.name}, ...]; 

，在你的HTML，您可以访问这样的名称：

<p> Tætteste butik: {{this.storeArray[0].name}} </p> 

如果您需要将它们一起打印用于记录目的，请执行下列操作：

console.log('se:' + typeof(this.storeArray[0]) + this.storeArray[0].dist 
    + " " + this.storeArray[0].name); 

Answer 2

public calculateDist(){ 
 

 
    var distRoskilde = ((this.usrStoreLat-this.roskilde.lat)+(this.usrStoreLong-this.roskilde.long)); 
 
    var distValby  = ((this.usrStoreLat-this.valby.lat)+(this.usrStoreLong-this.valby.long)); 
 
    var distKbhK  = ((this.usrStoreLat-this.kbhK.lat)+(this.usrStoreLong-this.kbhK.long)); 
 
    
 
    this.storeArray = [{dist: distRoskilde, name: this.roskilde.name}, {dist: distValby, name: this.valby.name}, {dist: distKbhK, name:this.kbhK.name}]; 
 
    this.storeArray.sort(); 
 
    
 
    console.log('se:' + typeof(this.storeArray[0]) + this.storeArray[0].dist + " " + this.storeArray[0].name); 
 
    }

@ggrading所以，现在这一点，对不对？

Answer 3

我做了什么@ggrading建议，反而使一个variabel用于显示HTML部分，它需要：

nearestStore：串;

this.nearestStore = this.storeArray [0] .name;

in the html：{{nearestStore}}

谢谢！