大约有 43,000 项符合查询结果（耗时：0.0230秒） [XML]
IOCTL Linux device driver [closed]
...vr_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", DRIVER_RELEASE);
}
static DEVICE_ATTR(version, S_IRUGO, mydrvr_version_show, NULL);
And during driver setup:
device_create_file(dev, &dev_attr_version);
You would then ha...
Why should casting be avoided? [closed]
... compiler won't warn you about those potential problems. Just for example, char a=(char)123456;. The exact result of this implementation defined (depends on the size and signedness of char), and except in rather strange situations, probably isn't useful. C casts also vary in whether they're somethin...
nodejs how to read keystrokes from stdin
...nswer since this capability was stripped from tty, here's how to get a raw character stream from stdin:
var stdin = process.stdin;
// without this, we would only get streams once enter is pressed
stdin.setRawMode( true );
// resume stdin in the parent process (node app won't quit all by itself
//...
Set breakpoint in C or C++ code programmatically for gdb on Linux
...
By looking here, I found the following way:
void main(int argc, char** argv)
{
asm("int $3");
int a = 3;
a++; // In gdb> print a; expect result to be 3
}
This seems a touch hackish to me. And I think this only works on x86 architecture.
...
Add leading zeroes to number in Java? [duplicate]
... See begray's answer which uses the correct flags to zero pad a 3 character wide output.
– Robert
Sep 5 '12 at 19:47
3
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How to model type-safe enum types?
...urns an Iterator, map, flatMap, filter, etc.
This answer is essentially a selected parts from this article in my blog.
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Encrypt & Decrypt using PyCrypto AES 256
...code's scope - hashing is just a guarantee that the key is usable with the selected cipher.
– zwer
Jun 20 '17 at 20:35
2
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What method in the String class returns only the first N characters?
...input string to is longer than the provided length N , only the first N characters are to be displayed.
12 Answers
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How do I find the width & height of a terminal window?
... wrapper for that. E.g in Perl you can use Term::Size:
use Term::Size qw( chars );
my ( $columns, $rows ) = chars \*STDOUT;
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Replace multiple whitespaces with single whitespace in JavaScript string
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Isn't it obvious? it replaces more than 1 whitespace char with 1 whitespace char. (the desired result)
– War
Mar 22 '13 at 16:05
4
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