Iterate over object in Angular

Question

I am trying to do some things in Angular 2 Alpha 28, and am having an issue with dictionaries and NgFor.

I have an interface in TypeScript looking like this:

Answer 1

Here's a variation on some of the above answers that supports multiple transforms (keyval, key, value):

import { Pipe, PipeTransform } from '@angular/core';

type Args = 'keyval'|'key'|'value';

@Pipe({
  name: 'mapToIterable',
  pure: false
})
export class MapToIterablePipe implements PipeTransform {
  transform(obj: {}, arg: Args = 'keyval') {
    return arg === 'keyval' ?
        Object.keys(obj).map(key => ({key: key, value: obj[key]})) :
      arg === 'key' ?
        Object.keys(obj) :
      arg === 'value' ?
        Object.keys(obj).map(key => obj[key]) :
      null;
  }
}

Usage

map = {
    'a': 'aee',
    'b': 'bee',
    'c': 'see'
}

{{o.key}}: {{o.value}}
  
a: aee
  
b: bee
  
c: see

{{o.key}}: {{o.value}}
  
a: aee
  
b: bee
  
c: see

{{k}}
  
a
  
b
  
c

{{v}}
  
aee
  
bee
  
see