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What is a “callback” in C and how are they implemented?
...RandomValue(void)
{
return rand();
}
int main(void)
{
int myarray[10];
populate_array(myarray, 10, getNextRandomValue);
...
}
Here, the populate_array function takes a function pointer as its third parameter, and calls it to get the values to populate the array with. We've written...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...看程序在打开哪些文件： bpftrace -e & 39;tracepoint:syscalls:sys_enter_open { printf("%s %s n
图：BPF性能工具及其可见性
bpftrace安装请参考：bpftrace-install 。
1、查看哪些程序（如head,tail）正在打开什么文件：
# bpftrace -e 'tracepoint:sysca...
Standardize data columns in R
... function on the data to do what you want.
dat <- data.frame(x = rnorm(10, 30, .2), y = runif(10, 3, 5))
scaled.dat <- scale(dat)
# check that we get mean of 0 and sd of 1
colMeans(scaled.dat) # faster version of apply(scaled.dat, 2, mean)
apply(scaled.dat, 2, sd)
Using built in functions...
Dealing with “Xerces hell” in Java/Maven?
... SkyWalker
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answered Jul 26 '12 at 22:18
jtahlbornjtahlborn
50k55 gold...
How to set the current working directory? [duplicate]
... |
edited Feb 13 '13 at 10:43
Alex L
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answered ...
JNI converting jstring to char *
...
answered Nov 15 '10 at 6:35
Jason RogersJason Rogers
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...
How to return result of a SELECT inside a function in PostgreSQL?
... -- column alias only visible inside
, (count(*) * 100) / _max_tokens -- I added brackets
FROM (
SELECT t.txt
FROM token t
WHERE t.chartype = 'ALPHABETIC'
LIMIT _max_tokens
) t
GROUP BY t.txt
ORDER BY cnt DESC; ...
Splitting templated C++ classes into .hpp/.cpp files--is it possible?
...
answered Jan 26 '10 at 23:52
Sharjith N.Sharjith N.
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...
Automatically add newline at end of curl response body
...the weird characters.
– jcollum
Aug 10 '17 at 20:57
...