在角度2打字稿中过滤数组

Question

我正在研究如何用打字稿过滤带Angular 2中数据的数组。过滤是针对Ionic 2中的搜索栏，模板中的列表正在获取数据并显示，但过滤不起作用。

initializeItems(i:number) { 
this.http.get('https://maps.googleapis.com/maps/api/place/details/json?placeid='+this.placeid+'&key=AIzaSyBPi-ayuvkTht4wddCcvcy0l2wIBdT9P2w').map(res => res.json()).subscribe(data => { 
    this.locations[i]._detail = data.result; 

    this.names.push([ 
    { 
     name: this.locations[i]._detail.name, 
     adress: this.locations[i]._detail.formatted_address, 
     phone: this.locations[i]._detail.formatted_phone_number 
    } 
    ]); 

    this.items = this.names; 
    console.log(this.items); 
}); 
} 

getItems(ev) { 
    this.items = this.names; 
    console.log(this.items); 
    // set val to the value of the ev target 
    var val = ev.target.value; 

    // if the value is an empty string don't filter the items 
    if (val && val.trim() != '') { 
    this.items = this.items.filter((item) => { 
     return (item.name.toLowerCase().indexOf(val.toLowerCase()) > -1); 
    }) 
    } 
} 

---

当我在搜索栏键入我得到这个错误。

Answer 1

我想你申请push错误。将对象推入数组而不是另一个数组。如果您有多个名称，请使用spread运营商

this.names.push(
    { 
     name: this.locations[i]._detail.name, 
     adress: this.locations[i]._detail.formatted_address, 
     phone: this.locations[i]._detail.formatted_phone_number 
    } 
); 

Answer 2

我找到了解决方案。

1. 改变了键为字符串对象中的
2. 加入[0]中返回语句
3. 阵列改为orginames并设定项目= orginames，这确保了该阵列将不会是空的，如果你搜索并再次删除该单词。

---

initializeItems(i:number) { 
this.http.get('https://maps.googleapis.com/maps/api/place/details/json?placeid='+this.placeid+'&key=AIzaSyBPi-ayuvkTht4wddCcvcy0l2wIBdT9P2w').map(res => res.json()).subscribe(data => { 
    this.locations[i]._detail = data.result; 


    this.orginames.push([ 
    { 
     "name": this.locations[i]._detail.name, 
     "adress": this.locations[i]._detail.formatted_address, 
     "phone": this.locations[i]._detail.formatted_phone_number 
    } 
    ]); 

    this.items = this.orginames; 
    // this.orginames.push(this.locations[i]._detail.name); 

}); 
console.log(this.items); 

} 

getItems(ev) { 
    this.items = this.orginames; 
    //console.log(this.items); 
    // set val to the value of the ev target 
    var val = ev.target.value; 

    // if the value is an empty string don't filter the items 
    if (val && val.trim() != '') { 
    this.items = this.items.filter((item) => { 
     return (item[0].name.toLowerCase().indexOf(val.toLowerCase()) > -1); 
    }) 
    } 
}