Angular2使用RegExp过滤带有管道的对象数组？

Question

After hours of searching on stackoverflow and google I did not find what I was searching, I did find something that gave me an idea for an alternative solution.

Object example:

items = [
{
    title: "This is title", 
    email: "test@test.com",
    status: "confirmed"
},
{
    title: "This another one", 
    email: "someone@something.com",
    status: "pending"
{    
    title: "Just a random string", 
    email: "me@you.co.uk",
    status: "pending"
{    
]

The resolution:

 import { Pipe, PipeTransform } from '@angular/core'; @Pipe({ name: 'filter', pure: false }) export class FilterPipe implements PipeTransform { transform(value: any, args?: any): any { if(args == '') { return value; } let query = args.toLowerCase(); return value.filter(task => task.title.toLowerCase().indexOf(query) > -1 || task.email.toLowerCase().indexOf(query) > -1 || task.status.toLowerCase().indexOf(query) > -1 ); } } 

 <div *ngFor="item of (items | filter:'this is') "> {{item | json}} </div> 

This will give me:

{title: "This is title", email: "test@test.com",status: "confirmed"}

It works as is, but my intention was to make it work with RegExp, I have tried but for some reason I got an error when I used var something = new RegExp(// some rule).

Any idea is much appreciated.

Answer 1

try this

import {Pipe} from 'angular2/core';

// Tell Angular2 we're creating a Pipe with TypeScript decorators
@Pipe({
  name: 'RegexPipe'
})
export class RegexPipe {

  transform(value, args?) {
    // ES6 array destructuring
    let [pattern] = args;
    return value.filter(task => {
        reg = new Regex(pattern);
        found = reg.test(task.title);
      return found;
    });
  }

}

<div *ngFor="item of (items | RegexPipe:'/this is (.)*/') ">
   {{item | json}}
 </div>