擅长:python、mysql、java
<p>使用<a href="http://docs.python.org/2/library/stdtypes#sequence-types-str-unicode-list-tuple-bytearray-buffer-xrange">^{<cd1>}</a>:</p>
<pre><code>>>> ['hit','miss','miss','hit','miss'].count('hit')
2
>>> grid = [['hit','miss','miss','hit','miss'],
... ['miss','miss','hit','hit','miss'],
... ['miss','miss','miss','hit','hit'],
... ['miss','miss','miss','hit','miss'],
... ['hit','miss','miss','miss','miss']]
>>> [row.count('hit') for row in grid]
[2, 2, 2, 1, 1]
</code></pre>
<p>以及<a href="http://docs.python.org/2/library/functions.html#sum">^{<cd2>}</a>:</p>
<pre><code>>>> sum(row.count('hit') for row in grid)
8
</code></pre>