<p>Hi,</p>
<p>I'm looking for some info on what the following does:</p>
<p>itemresp := &api.RetrieveResponse{}</p>
<p>I'd like to create a new (faked) value and assign it to RetrieveResponse. How would I go about it, if the type definition for RetrieveResponse is as follows:</p>
<p>type RetrieveResponse struct {
Status int
Complete int
List map[string]Item
Since int
}</p>
<hr/>**评论：**<br/><br/>v0idl0gic: <pre><p>itemresp := &api.RetrieveResponse{} </p>
<p>is the same as:</p>
<p>itemresp := new(api.RetrieveResponse) </p></pre>TUSF: <pre><p>You want to look up struct literals. <a href="https://tour.golang.org/moretypes/5" rel="nofollow">https://tour.golang.org/moretypes/5</a></p>
<p>Here's an example of what you might do:</p>
<pre><code>itemresp := &api.RetrieveResponse{ 200, 2000, map[string]Item{ "firstItem": Item{} }, 1458676981 }
</code></pre>
<p>If you want a bit more control (such as excluding some parameters):</p>
<pre><code>itemresp := &api.RetrieveResponse{
Status: 200,
Complete: 2000,
Since: 1458676981 }
</code></pre></pre>ahfeck1t: <pre><blockquote>
<p>itemresp := &api.RetrieveResponse{
Status: 200,
Complete: 2000,
Since: 1458676981 }</p>
</blockquote>
<p>Thanks!</p></pre>qcoh: <pre><blockquote>
<p><code>itemresp := &api.RetrieveResponse{}</code> </p>
</blockquote>
<p>From the spec:</p>
<blockquote>
<p>Taking the address of a composite literal generates a pointer to a unique variable initialized with the literal's value.</p>
</blockquote>
<p>Not sure if I parse the rest of your question correctly. Do you want to create an object of type <code>*api.RetrieveResponse</code> with fake (?) values? Try <code>itemresp := &api.RetrieveResponse{Status: 123, Complete: 456, List: make(map[string]Item), Since: 789}</code>.</p></pre>ahfeck1t: <pre><p>Will give it a go - thats a great reference on the composite literal. Havent come across that syntax to date, and that explains it very well. Thanks</p></pre>
