大约有 48,000 项符合查询结果（耗时：0.0491秒） [XML]
Running script upon login mac [closed]
...
|
show 4 more comments
387
...
Get exit code of a background process
...ing. (ps | grep isn't idiot-proof. If you have time you can come up with a more robust way to tell whether the process is still running).
Here's a skeleton script:
# simulate a long process that will have an identifiable exit code
(sleep 15 ; /bin/false) &
my_pid=$!
while ps | grep " $my_pid ...
What is HEAD in Git?
...he commit from which the working tree's current state was initialized. In more practical terms, it can be thought of as a symbolic reference to the checked-out commit.
– Ben Collins
Dec 9 '13 at 7:25
...
What is the largest Safe UDP Packet Size on the Internet
...t said; having less fragments makes delivery "safer" because if there were more than one and any one of those never made it - the whole packet (datagram) is dropped by UDP.
– markmnl
Jan 5 '13 at 9:28
...
Shiro vs. SpringSecurity [closed]
...eem like it is making security easier to implement, Shiro seems to be much more coherent and easier to understand. I am looking for lists of pros and cons between these two frameworks.
...
Remap values in pandas column with a dict
...
It looks like this doesn't work anymore at all, which isn't surprising given the answer was from 4 years ago. This question needs a new answer given how general the operation is...
– PrestonH
Nov 21 '17 at 17:01
...
Simplest way to read json from a URL in java
...n, and I have to concatenate the lines instead of the characters, which is more expensive. That wouldn't keep the code as short as it is now. Furthermore, in JSON notation there is no concept of "lines", so why should I read them as such?
– Roland Illig
Dec 1 '...
How to start a background process in Python?
I'm trying to port a shell script to the much more readable python version. The original shell script starts several processes (utilities, monitors, etc.) in the background with "&". How can I achieve the same effect in python? I'd like these processes not to die when the python scripts complete. I ...
How to count the number of set bits in a 32-bit integer?
...ith a few clever optimizations. Continuing on with the same pattern for 2 more steps can widen to 2x 16-bit then 1x 32-bit counts. But there is a more efficient way on machines with fast hardware multiply:
Once we have few enough "elements", a multiply with a magic constant can sum all the element...
xpath find if node exists
... is no xsl equivalent to if-then-else, so if you are looking for something more like an if-then-else, you're normally better off using xsl:choose and xsl:otherwise. So, Patrick's example syntax will work, but this is an alternative:
<xsl:choose>
<xsl:when test="/html/body">body node ex...