在用mongo进行查询时，$exists表示是否document是否包含这个field，即使field的value为null也算是包含。$exists
Syntax: { field: { $exists: } }
When is true, $exists matches the documents that contain the field, including documents w...
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其他好文 时间：
2014-08-24 11:43:02
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187
Implement wildcard pattern matching with support for'?'and'*'.'?' Matches any single character.'*' Matches any sequence of characters (including the e...
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其他好文 时间：
2014-08-19 14:24:14
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182
Wildcard Matching
Implement wildcard pattern matching with support for '?' and '*'.
'?' Matches any single character.
'*' Matches any sequence of characters (including the empty sequen...
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其他好文 时间：
2014-08-18 18:34:13
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214
leetcode这道题还挺有意思的，实现通配符，'?'匹配任意字符，'*'匹配任意长度字符串，晚上尝试了一下，题目如下：Implement wildcard pattern matching with support for'?'and'*'.'?' Matches any single chara...
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其他好文 时间：
2014-08-16 01:01:59
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351
Implement wildcard pattern matching with support for '?' and '*'.'?' Matches any single character.'*' Matches any sequence of characters (including th...
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其他好文 时间：
2014-08-14 19:44:09
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134
ANT通配符有三种：通配符说明?匹配任何单字符*匹配0或者任意数量的字符**匹配0或者更多的目录例子：URL路径说明/app/*.x匹配(Matches)所有在app路径下的.x文件/app/p?ttern匹配(Matches) /app/pattern 和 /app/pXttern,但是不包括/a...
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其他好文 时间：
2014-08-14 19:22:19
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336
A synchronization point at which threads can pair and swap elements within pairs. Each thread presents some object on entry to the
exchange method, matches with a partner thread, and receives its par...
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其他好文 时间：
2014-08-11 17:57:12
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303
Where's Waldorf?
Given a m by n grid
of letters, ( ),
and a list of words, find the location in the grid at which the word can be found. A word matches a straight, uninterrupted line o...
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其他好文 时间：
2014-08-09 18:42:38
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370
Regular Expression MatchingImplement regular expression matching with support for'.'and'*'.'.' Matches any single character.'*' Matches zero or more o...
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其他好文 时间：
2014-08-08 17:59:16
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173
题目：Implement regular expression matching with support for '.' and '*'.'.' Matches any single character.'*' Matches zero or more of the preceding elem....
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编程语言 时间：
2014-08-06 04:11:20
阅读次数：
429
