大约有 47,000 项符合查询结果（耗时：0.0581秒） [XML]
Is gcc std::unordered_map implementation slow? If so - why?
...gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on debian testing).
I will submit a bug report.. until then: DO NOT use std::unordered_map with gcc 4.7!
...
Using {} in a case statement. Why?
...
Macke
22k66 gold badges7272 silver badges104104 bronze badges
answered Nov 17 '13 at 13:25
RotemRotem
19.2k66 gold badge...
Pandas aggregate count distinct
...
How about either of:
>>> df
date duration user_id
0 2013-04-01 30 0001
1 2013-04-01 15 0001
2 2013-04-01 20 0002
3 2013-04-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "user_id...
Why main does not return 0 here?
...
That rule was added in the 1999 version of the C standard. In C90, the status returned is undefined.
You can enable it by passing -std=c99 to gcc.
As a side note, interestingly 9 is returned because it's the return of printf which just wrote 9 characters.
...
Django - filtering on foreign key properties
...
answered Dec 30 '09 at 18:07
FragsworthFragsworth
26.4k2424 gold badges7373 silver badges9595 bronze badges
...
pandas: multiple conditions while indexing data frame - unexpected behavior
...
answered Mar 23 '14 at 13:02
DSMDSM
269k5050 gold badges494494 silver badges427427 bronze badges
...
How can you get the SSH return code using Paramiko?
....set_missing_host_key_policy(paramiko.WarningPolicy())
client.connect('127.0.0.1', password=pw)
while True:
cmd = raw_input("Command to run: ")
if cmd == "":
break
chan = client.get_transport().open_session()
print "running '%s'" % cmd
chan.exec_command(cmd)
print "e...
Set markers for individual points on a line in Matplotlib
...or example, using a dashed line and blue circle markers:
plt.plot(range(10), linestyle='--', marker='o', color='b')
A shortcut call for the same thing:
plt.plot(range(10), '--bo')
Here is a list of the possible line and marker styles:
================ ===============================
ch...
How to send only one UDP packet with netcat?
...
205
If you are using bash, you might as well write
echo -n "hello" >/dev/udp/localhost/8000
a...