title: patch Value in a nested form control using angular2
body: <p>I need to set a value in a nested control in a FormBuiler and the model is the following:</p>
  
  <pre><code>this.addAccForm = this.fb.group({
        accid: ['', Validators.required],
        status: '',
        cyc: this.fb.array([
          this.initCyc(),
        ])
      })
  
  initCyc() {
        return this.fb.group({
          cycid: ['', Validators.required],
          name: ['', Validators.required],
          description: ['', Validators.required],
          status: ['', Validators.required],
          det: this.fb.group({
              dcycid: ['', Validators.required],
              status: ['', Validators.required]
          })
        })
  </code></pre>
  
  <p>I need to set a value cycid and also dcycid but I m stuck to it, I've tried to use the following  line , but it does NOT help :</p>
  
  <pre><code>this.addAccForm.patchValue({cyc: { [0]: {cycid: 1234567 }}});
  </code></pre>
  
  <p>//</p>
  
  <pre><code>this.addAccForm.patchValue({cyc: { [0]: { det : {dcycid: 9876543}}}});
  </code></pre>
  
  <p>Any idea how it should be?</p>