If I do this, it works. Which would mean listing out each prop that I
expect to test. That sounds like work!
It's better than nothing, but not as good as it should be.
ngOnInit() {
this.offers.exp = {};
this.getOffers();
}
On Monday, July 18, 2016 at 12:29:58 PM UTC-7, p. stephen w wrote:
>
> I wrote a pipe to handle this, but that seems like over kill. Testing for
> a key in an object is basic, but a critical operation.
> Does NG2 really not allow do this, or am I just missing something?
>
>
>
> @Pipe({name: 'matchkey'})
> export class MatchkeyPipe implements PipeTransform {
> transform(obj:any, keys:any[]):any {
> try {
> if (obj && keys) {
> return keys.find(key => obj[key])
> }
> } catch (e) {
> console.log('...objectkey error ', e);
> }
> }
> }
>
>
>
> On Monday, July 18, 2016 at 9:43:24 AM UTC-7, p. stephen w wrote:
>>
>> NgInit is currently calling my service to return the Json.
>> Is it true that the template doesn't get parsed until
>> controller/component has ran?
>>
>> How can I use an elvis (LOL, love the name)? I'm assuming that's a
>> is-nullable operator?
>>
>>
>>
>>
>>
>> On Sunday, July 17, 2016 at 7:53:53 PM UTC-7, Sander Elias wrote:
>>>
>>> Hi P. Stephen,
>>>
>>> Not entirely. The problem is that probably the myObj is undefined when
>>> the component initializes. Have you tried setting it to an empty object
>>> directly on your controller's constructor?
>>> Usually when you need something like this, you can use the elvis(?)
>>> operator to protect against undefined parts. This is not going to work for
>>> array notation.
>>> This does work for me:
>>>
>>> import { Component } from '@angular/core';
>>>
>>>
>>> @Component({
>>> selector: 'my-app',
>>> template: `<h1>My First Angular 2 App</h1>
>>> {{myObj['test']}}
>>> <pre>{{myObj|json}}</pre>
>>> `
>>> })
>>> export class AppComponent {
>>> myObj = {}
>>> ngOnInit() {
>>> this.myObj= {test : "hello"}
>>> }
>>> }
>>>
>>>
>>> Hope this helps you a bit,
>>> Regards
>>> Sander
>>>
>>>
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