title: How to check if an array of arrays contains an empty array in my selector?
body: <p>I have a selector that is selecting the array of arrays</p>
  <pre><code>export const doesArrayContainEmptyArray = createSelector(
      getTestState,
      (state: TestState) =&gt; state.selectedTemplate?.plate.map(p =&gt; p.plateTest.map(pt =&gt; pt?.columnValues))
  );
  </code></pre>
  <p>In my .ts file I have an observable that calls the selector</p>
  <pre><code>    doesArrayContainEmptyArray$ = this.store.pipe(select(doesArrayContainEmptyArray));
  </code></pre>
  <p>I console logged it out like this</p>
  <pre><code>    this.doesArrayContainEmptyArray$.subscribe(a=&gt; console.log(&quot;array: &quot;, a));
  </code></pre>
  <p>In the console I see:</p>
  <pre><code>[Array(4)]
     0: Array(4)
        0: ['test']
        1: []
        2: []
        3: []
  </code></pre>
  <p>I want the selector to return false if it the array contains an array that is empty and true if all inner arrays have values</p>