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            "title": "Word Frequency",
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            "content": "<p>Write a bash script to calculate the <span data-keyword=\"frequency-textfile\">frequency</span> of each word in a text file <code>words.txt</code>.</p>\n\n<p>For simplicity sake, you may assume:</p>\n\n<ul>\n\t<li><code>words.txt</code> contains only lowercase characters and space <code>&#39; &#39;</code> characters.</li>\n\t<li>Each word must consist of lowercase characters only.</li>\n\t<li>Words are separated by one or more whitespace characters.</li>\n</ul>\n\n<p><strong class=\"example\">Example:</strong></p>\n\n<p>Assume that <code>words.txt</code> has the following content:</p>\n\n<pre>\nthe day is sunny the the\nthe sunny is is\n</pre>\n\n<p>Your script should output the following, sorted by descending frequency:</p>\n\n<pre>\nthe 4\nis 3\nsunny 2\nday 1\n</pre>\n\n<p><b>Note:</b></p>\n\n<ul>\n\t<li>Don&#39;t worry about handling ties, it is guaranteed that each word&#39;s frequency count is unique.</li>\n\t<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>\n</ul>\n",
            "translatedTitle": "统计词频",
            "translatedContent": "<p>写一个 bash 脚本以统计一个文本文件&nbsp;<code>words.txt</code>&nbsp;中每个单词出现的频率。</p>\n\n<p>为了简单起见，你可以假设：</p>\n\n<ul>\n\t<li><code>words.txt</code>只包括小写字母和&nbsp;<code>&#39; &#39;</code>&nbsp;。</li>\n\t<li>每个单词只由小写字母组成。</li>\n\t<li>单词间由一个或多个空格字符分隔。</li>\n</ul>\n\n<p><strong>示例:</strong></p>\n\n<p>假设 <code>words.txt</code> 内容如下：</p>\n\n<pre>the day is sunny the the\nthe sunny is is\n</pre>\n\n<p>你的脚本应当输出（以词频降序排列）：</p>\n\n<pre>the 4\nis 3\nsunny 2\nday 1\n</pre>\n\n<p><strong>说明:</strong></p>\n\n<ul>\n\t<li>不要担心词频相同的单词的排序问题，每个单词出现的频率都是唯一的。</li>\n\t<li>你可以使用一行&nbsp;<a href=\"http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-4.html\">Unix pipes</a>&nbsp;实现吗？</li>\n</ul>\n",
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                    "lang": "Bash",
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                    "code": "# Read from the file words.txt and output the word frequency list to stdout.",
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