title: How to solve "Observable.share is not a function" Angular 2
body: <p>I use cache structure in ionic 2. I define an observable array. I record the data that is returned from the server here. But every time this shape gives me a mistake. How do I solve it?</p>
  
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  <pre class="snippet-code-js lang-js prettyprint-override"><code> marketArray : Observable&lt;any&gt;; /* GLOBAL */   this.http.get(this.base_url,header).map(res=&gt;res.json()).subscribe(data=&gt;{
        loader.dismissAll();
        this.marketArray = this.cache.loadFromObservable(this.base_url, data["Table"]);
        
      }, (error)=&gt;{
        loader.dismissAll();
        this.marketler();
      });</code></pre>
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