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MFC CString::Format()函数详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...输出实数
g选用f与e格式中输出宽度较小的格式，不输出0
ld输入输出long型数据
lf输入输出double型数据
m数据输出宽度为m
.n输出小数位数为n
2、Args是一个变体数组，即它里面可以有多个参数，而且每个参数可以不同。
如...
Why does find -exec mv {} ./target/ + not work?
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From the manual page:
-exec command ;
Execute command; true if 0 status is returned. All following arguments to find are taken to be arguments to the command until an argument consisting of `;' is encountered. The string `{}' is replaced by the current file name being processed ever...
Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the columns on SELECT to G...
byte[] to hex string [duplicate]
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605
There is a built in method for this:
byte[] data = { 1, 2, 4, 8, 16, 32 };
string hex = BitCo...
Adding a user to a group in django
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edited Dec 4 '17 at 9:04
answered Jun 9 '11 at 6:24
jua...
海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...就拿最简单的两个数据使用Apache提供的 Levenshtein for 循环100w次计算这两个数据的相似度。代码结果如下：
String s1 = "你妈妈喊你回家吃饭哦，回家罗回家罗" ;
String s2 = "你妈妈叫你回家吃饭啦，回家罗回家罗" ;
long t1 = System.c...
Bash foreach loop
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answered Nov 12 '10 at 8:35
Greg HewgillGreg Hewgill
783k167167 gold badges10841084 silver badges12221222 bronze badges
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What is a lambda expression in C++11?
... be writing a whole class just to do something trivial and one off.
In C++03 you might be tempted to write something like the following, to keep the functor local:
void func2(std::vector<int>& v) {
struct {
void operator()(int) {
// do something
}
} f;
std::for_each(...
How can I convert a string to a number in Perl?
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90
You don't need to convert it at all:
% perl -e 'print "5.45" + 0.1;'
5.55
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check if jquery has been loaded, then load it if false
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