这个只要一行代码就搞定了。详细请看：In order to get the right frame/bounds of your UIImageView after resizing, you need first ask auto-layout to update that layout usin...
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其他好文 时间：
2015-02-25 18:29:22
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124
1 TOP这是一个大家经常问到的问题，例如在SQLSERVER中可以使用如下语句来取得记录集中的前十条记录：SELECT TOP 10 * FROM [index] ORDER BY indexid DESC;但是这条SQL语句在SQLite中是无法执行的，应该改为：SELECT * FROM [i...
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数据库 时间：
2015-02-25 18:28:36
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135
Time Limit:3000MS Memory Limit:0KBDescriptionMost crossword puzzle fans are used to anagrams--groups of words with the same letters in different order...
1.对查询进行优化，应尽量避免全表扫描，首先应考虑在 where 及 order by 涉及的列上建立索引。2.应尽量避免在 where 子句中对字段进行 null 值判断，否则将导致引擎放弃使用索引而进行全表扫描，如：select id from t where num is null可以在num...
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数据库 时间：
2015-02-24 19:47:53
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210
class Node{public: int data; Node* left; Node* right;};void pre-order(Node* root){ stack stk; if (root) stk.push(root); while...
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其他好文 时间：
2015-02-24 16:16:46
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122
The highest building in our city has only one elevator. A request list is made up with N positive numbers. The numbers denote at which floors the elevator will stop, in specified order. It costs 6 sec...
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其他好文 时间：
2015-02-24 12:36:59
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344
Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid "ins...
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系统相关 时间：
2015-02-23 23:36:08
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188
Problem Description
The TV shows such as You Are the One has been very popular. In order to meet the need of boys who are still single, TJUT hold the show itself. The show is hold in the Small hall,...
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其他好文 时间：
2015-02-23 15:29:41
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193
Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given "25525511135",return ["255.255.11.135", "255.255.111.35"]. (Order does not m...
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其他好文 时间：
2015-02-23 10:55:22
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176
select name from emp order by salary;
ORDER BY 默认是按照升序排列， 当需要倒序时 用 ORDRE BY salary DESC
ORDER BY 不一定要基于列名 ，也可以用数字表示 基于第几列：
select name from emp order by 3; salary是从左到右第三列。
按照多个字段排...
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数据库 时间：
2015-02-23 09:46:34
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176
