2022-03-29 15:21:05 +08:00
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<p>Write a bash script to calculate the frequency of each word in a text file <code>words.txt</code>.</p>
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<p>For simplicity sake, you may assume:</p>
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<ul>
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<li><code>words.txt</code> contains only lowercase characters and space <code>' '</code> characters.</li>
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<li>Each word must consist of lowercase characters only.</li>
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<li>Words are separated by one or more whitespace characters.</li>
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</ul>
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<p><strong>Example:</strong></p>
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<p>Assume that <code>words.txt</code> has the following content:</p>
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<pre>
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the day is sunny the the
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the sunny is is
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</pre>
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<p>Your script should output the following, sorted by descending frequency:</p>
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<pre>
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the 4
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is 3
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sunny 2
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day 1
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</pre>
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<p><b>Note:</b></p>
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<ul>
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<li>Don't worry about handling ties, it is guaranteed that each word's frequency count is unique.</li>
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<li>Could you write it in one-line using <a href="http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-4.html">Unix pipes</a>?</li>
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</ul>
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