大约有 8,800 项符合查询结果（耗时：0.0261秒） [XML]
How to deal with SettingWithCopyWarning in Pandas?
...ers. For example,
df[df.A > 5]['B']
1 3
2 6
Name: B, dtype: int64
And,
df.loc[df.A > 5, 'B']
1 3
2 6
Name: B, dtype: int64
These return the same result, so if you are only reading these values, it makes no difference. So, what is the issue? The problem with chained assignm...
Convert bytes to a string
...
64
Using "windows-1252" is not reliable either (e.g., for other language versions of Windows), wouldn't it be best to use sys.stdout.encoding?...
Fill SVG path element with a background-image
...
very nice, does this work with base64 images too? instead of wall.jpg something like data:image/png;base64,iVBORw0KGgoAA like you would in normal CSS?
– Christoph
May 10 '12 at 13:55
...
How do I get the localhost name in PowerShell?
...
64
Don't forget that all your old console utilities work just fine in PowerShell:
PS> hostname...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...is:
This shows the result of benchmark runs on the following code:
uint64_t do_Ndec(int thread, int loop_count)
{
uint64_t start;
uint64_t end;
int __d0;
asm volatile ("rdtsc\n\tshl $32, %%rdx\n\tor %%rdx, %0" : "=a" (start) : : "%rdx");
mutex.lock();
mutex.unlock();
asm volatile ...
How can I randomize the lines in a file using standard tools on Red Hat Linux?
...
64
And a Perl one-liner you get!
perl -MList::Util -e 'print List::Util::shuffle <>'
It u...
What is the correct way to restore a deleted file from SVN?
...6:12
BCS
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answered Jan 29 '09 at 5:01
Sean Bright...
what is faster: in_array or isset? [closed]
...
Jason McCrearyJason McCreary
64.4k2020 gold badges122122 silver badges166166 bronze badges
...
How to get the system uptime in Windows? [closed]
...d -eq 6005 -or $_.Id -eq 6006}
6: Programmatically, by using GetTickCount64
GetTickCount64 retrieves the number of milliseconds that have elapsed since the system was started.
7: By using WMI
wmic os get lastbootuptime
8: The new uptime.exe for Windows XP and up
Like the tool from Micros...
Missing Maven dependencies in Eclipse project
...My Project was just screwed up. Here is how I fixed it for Eclipse Indigo x64 (J2EE 3.7.3):
Deleted my POM file (backedup of course).
Project Context Menu > Maven > Disable Maven Nature.
Deleted the project (but not contents on disk).
Re-imported as Import > General > Existing Project....