大约有 44,000 项符合查询结果（耗时：0.0441秒） [XML]
How could the UNIX sort command sort a very large file?
...
use -T to specify the temp dir
– glenn jackman
Jun 22 '11 at 0:37
add a comment
|
...
Modulo operation with negative numbers
...mple A. 5/(-3) is -1
=> (-1) * (-3) + 5%(-3) = 5
This can only happen if 5%(-3) is 2.
Example B. (-5)/3 is -1
=> (-1) * 3 + (-5)%3 = -5
This can only happen if (-5)%3 is -2
share
|
impr...
How does a Linux/Unix Bash script know its own PID?
...
use $BASHPID or $$
See the manual for more information, including differences between the two.
TL;DRTFM
$$ Expands to the process ID of the shell.
In a () subshell, it expands to the process ID of the invoking shell, not the subshell.
$BASHPID Expands to the process ID of the current ...
How do I convert a git repository to mercurial?
... such add the following to your .hgrc file.
[extensions]
hgext.convert=
If you're using TortoiseHg on Windows then this file resides in your home directory as mercurial.ini. After this setting change you will be able to use the hg convert utility.
...
what is the difference between ?:, ?! and ?= in regex?
...ed for the meaning of these expressions but couldn't understand the exact difference between them.
This is what they say:
6...
How do I get the value of a textbox using jQuery?
...
There's a .val() method:
If you've got an input with an id of txtEmail you can use the following code to access the value of the text box:
$("#txtEmail").val()
You can also use the val(string) method to set that value:
$("#txtEmail").val("somethi...
Why is there no std::stou?
...lemented by calling ...", because the C++ standard still has the global as-if rule: if the standard says std::sto* must be implemented as wrappers for the C library functions, and a valid program cannot tell that they aren't secretly implemented differently, the implementation is valid.
...
How do I escape ampersands in batch files?
...ause who would be silly enough to define 20and as an environment variable? If you did, start http://www.google.com/search?q=ampersand%20and%20percentage could link tohttp://www.google.com/search?q=ampersandsomething-silly20percentage instead. Using ^% to escape in cmd, the example works as expected....
Static methods - How to call a method from another method?
...
@u0b34a0f6ae: I don't know if I am doing something good or not... but I defined a decorator inside a class. The decorator had to be a "staticmethod", not a "classmethod".
– André Caldas
Mar 20 '13 at 18:41
...
process.waitFor() never returns
...not reading the output before waiting for it to finish. This is fine only if the output doesn't fill the buffer. If it does, it will wait until you read the output, catch-22.
Perhaps you have some errors which you are not reading. This would case the application to stop and waitFor to wait forev...