title: Convert a vector of tuples in an array in JULIA
body: <p>I'm quite new to Julia and I'm trying to convert a vector of tuples in array.
  Here's an example</p>
  <pre><code>using Statistics
  a = randn((10, 100))
  q = (0.05, 0.95)
  conf_intervals = [quantile(a[i,:], q) for i in 1:10]
  </code></pre>
  <p>and <code>conf_intervals</code> is a <code>10-element Vector{Tuple{Float64, Float64}}</code>.</p>
  <p>The expected result should be a <code>10×2 Matrix{Float64}</code></p>
  <p>I tried splatting <code>conf_intervals</code> with <code>[conf_intervals...]</code> but the vector doesn't change.</p>
  <p>Thank you very much</p>