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    <title>scanPairs -- apply a function to the pairs in a hash table</title>
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o1 = HashTable{1 => 8 }
               2 => 20
               3 => 4
               4 => 20

o1 : HashTable</code></pre>
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              <pre><code class="language-macaulay2">i2 : scanPairs(t, (k,v) -> print (k+v))
9
22
7
24</code></pre>
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              <pre><code class="language-macaulay2">i3 : scanPairs(t, (k,v) -> if v==20 then print k)
2
4</code></pre>
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          <p>If <code>t</code> is not a hash table, then <code class="language-macaulay2">scan(pairs t, f)</code> is called.</p>
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              <pre><code class="language-macaulay2">i4 : scanPairs({4, 5, 6}, print)
(0, 4)
(1, 5)
(2, 6)</code></pre>
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        <h2>Caveat</h2>
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          <p>This function requires an immutable hash table.  To scan the pairs in a mutable hash table, use <span class="tt">scan(pairs t, f)</span>.</p>
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        <h2>See also</h2>
        <ul>
          <li><span><a href="_hash_sptables.html">hash tables</a></span></li>
          <li><span><a title="apply a function to each pair in a hash table" href="_apply__Pairs.html">applyPairs</a> -- apply a function to each pair in a hash table</span></li>
          <li><span><a title="list the pairs in a hash table, dictionary, or basic list" href="_pairs.html">pairs</a> -- list the pairs in a hash table, dictionary, or basic list</span></li>
          <li><span><a title="apply a function to each element in a list or sequence" href="_scan.html">scan</a> -- apply a function to each element in a list or sequence</span></li>
          <li><span><a title="apply a function to each key in a hash table or database" href="_scan__Keys.html">scanKeys</a> -- apply a function to each key in a hash table or database</span></li>
          <li><span><a title="apply a function to each value in a hash table or database" href="_scan__Values.html">scanValues</a> -- apply a function to each value in a hash table or database</span></li>
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          <h2>Ways to use <span class="tt">scanPairs</span>:</h2>
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            <li><kbd>scanPairs(HashTable,Function)</kbd></li>
            <li><kbd>scanPairs(Thing,Function)</kbd></li>
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          <h2>For the programmer</h2>
          <p>The object <a title="apply a function to the pairs in a hash table" href="_scan__Pairs.html">scanPairs</a> is <span>a <a title="the class of all compiled functions" href="___Compiled__Function.html">compiled function</a></span>.</p>
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          <p>The source of this document is in <span class="tt">Macaulay2Doc/ov_hashtables.m2:615:0</span>.</p>
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