Exploring the implementation of a pipe in Angular. Discovered that ngFor doesn't work with maps, prompting further research to find a solution. It seems that future features may address this issue, but for now, utilizing a mapToIterable pipe is the recommended workaround.
The code snippet is as follows:
import {Pipe, PipeTransform} from '@angular/core';
@Pipe({
name: 'mapToIterable'
})
export class MapToIterablePipe implements PipeTransform {
transform(map: Map<string, Object>, args: any = []): any {
const a: any[] = [];
console.log(map.keys()); // <- expected outcome
for (const k in map) {
if (map.has(k)) {
console.log("hello"); // <- not executed
console.log(k);
a.push({key: k, val: map.get(k)});
}
}
console.log(a); // <- always empty
return a;
}
}
export const MAPTOITERABLE_PROVIDERS = [
MapToIterablePipe
];
Although map.keys() returns the correct keys, other parts of the code are not functioning as intended.
Any advice on troubleshooting why the loop isn't populating the array correctly?