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/**
* Created by rc2122 on 5/17/2017.
*/
import {Pipe, PipeTransform} from '@angular/core';
@Pipe({name: 'groupBy'})
export class GroupByPipe implements PipeTransform {
transform(value: Array<any>, field: string): Array<any> {
const groupedObj = value.reduce((prev, cur)=> {
if(!prev[cur[field]]) {
prev[cur[field]] = [cur];
} else {
prev[cur[field]].push(cur);
}
return prev;
}, {});
return Object.keys(groupedObj).map((key:string) => {return { key, value: groupedObj[key] }; });
}
}
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