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微博为什么限制140字(附短信70字限制考) - 闲聊区 - 清泛IT社区，为创新赋能！
...就注册了，之后再也没登录过。今天在人人网转发状态，提示我超过140字了，突然就好奇大家都在凑什么热闹，为什么除了网易微博，都限制140个字呢?当然也已经有过关于这个问题的解释，比如人民网上这位“并没有twitter方面...
Find all storage devices attached to a Linux machine [closed]
...Disk /dev/xvda1: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/xvda1 ...
How do I create a crontab through a script
...romising but trying the second approach (with echo), I got "crontab: usage error: file name must be specified for replace." Cron man page shows syntax as crontab [ -u user ] file, that is, with a mandatory file name. Is there some trick to get it to accept the piped data instead?
...
PHP_SELF vs PATH_INFO vs SCRIPT_NAME vs REQUEST_URI
...
Example 4.
REQUEST_URI is different from SCRIPT_NAME when handling HTTP errors with scripts.
Using apache directive ErrorDocument 404 /404error.php
http://example.com/test.php
[REQUEST_URI] => /test.php
[SCRIPT_NAME] => /404error.php
On IIS server using custom error pages
http://example....
In C, how should I read a text file and print all strings
...sizeof buf, file)) > 0)
fwrite(buf, 1, nread, stdout);
if (ferror(file)) {
/* deal with error */
}
fclose(file);
}
The second method above is essentially how you will read a file with a dynamically allocated array:
char *buf = malloc(chunk);
if (buf == NULL) {
...
How do I trim leading/trailing whitespace in a standard way?
...
– Adam Rosenfield
Mar 16 '10 at 15:05
15
@nvl: No. str is a local variable, and changing it doe...
Visual Studio - Shortcut to Navigate to Solution Explorer
...e file.
– keyboardP
Jun 4 '11 at 19:05
1
...
How to declare variable and use it in the same Oracle SQL script?
...e from product where code = FL-208
*
ERROR at line 1:
ORA-06553: PLS-221: 'FL' is not a procedure or is undefined
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Can vim monitor realtime changes to a file
... can try?
– Patrick
Jan 29 '10 at 4:05
erm, that's pretty weird. are you using the macvim gui or the terminal version?...
How do I list all cron jobs for all users?
...xargs -r -0 rm
47 */8 * * * root rsync -axE --delete --ignore-errors / /mirror/ >/dev/null
17 1 * * * root /etc/cron.daily/apt
17 1 * * * root /etc/cron.daily/aptitude
17 1 * * * root /etc/cron.daily/find
17 1 * * * root /et...