title: How to copy an array in Julia 1.0
body: <p>My code is below. </p>
  
  <pre><code>V = ntuple(x -&gt; zeros(5, 5), 2)    
  V1 = rand(5,5)    
  copy!(V[1], V1)
  </code></pre>
  
  <p>I would like to replace all the values in <code>V[1]</code> by <code>V1</code>. <code>copy!</code> works well in Julia 0.6.3. However, it doesn't work in Julia 1.0.1. </p>
  
  <p>Error message: <code>MethodError: no method matching copy!(::Array{Float64,2}, ::Array{Float64,2})</code></p>
  
  <p>I really appreciate your help.</p>