title: removing tuples from list (Haskell)
body: <p>I want to write a function that takes as argument a list of tuples like this:</p>
  
  <pre><code>remove'  [ ("a", True), ("b", False), ("c", False), ("d", True) ]
  </code></pre>
  
  <p>I would like to return a list of tuples that have False as their second value, so I'd like my function to return</p>
  
  <pre><code>[ ("b", False), ("c", False) ]
  </code></pre>
  
  <p>Here's what I have so far but it won't load in GHCi. can anyone help me out? Thanks </p>
  
  <pre><code>remove' :: [(a,b)] -&gt; [(a,b)]
  remove' [(a,b)] = [ c | c &lt;- [(a,b)], c `notElem` True ]
  </code></pre>