大约有 47,000 项符合查询结果（耗时：0.0701秒） [XML]
Why should we typedef a struct so often in C?
...fter the typedef, is the case I guess.
Also note that while your example (and mine) omitted naming the struct itself, actually naming it is also useful for when you want to provide an opaque type. Then you'd have code like this in the header, for instance:
typedef struct Point Point;
Point * poi...
Amazon S3 boto - how to create a folder?
...olders in S3. S3 does not have folders, even though the management console and many tools do represent keys with slashes as such. See Working with Folders and read the part: "So the console uses object key names to present folders and hierarchy. In Amazon S3, you have only buckets and objects."
...
Git: Show all of the various changes to a single line in a specified file over the entire git histor
I've looked around, and am not sure if this is possible, but here goes:
5 Answers
5
...
How do I start Mongo DB from Windows?
...eated the path data/db too but when I tried to start mongodb using the command 'C:\mongodb\bin\mongod.exe' , it is not starting. It is showing admin web console waiting for connections on port 28017 .
...
Replace None with NaN in pandas dataframe
... which will replace the Python object None, not the string 'None'.
import pandas as pd
import numpy as np
For dataframe:
df = df.fillna(value=np.nan)
For column or series:
df.mycol.fillna(value=np.nan, inplace=True)
share...
How do I delete an exported environment variable?
...
unset is the command you're looking for.
unset GNUPLOT_DRIVER_DIR
share
|
improve this answer
|
follow
...
Getting activity from context in android
...ve a Context in the layout, but you will know it is actually your Activity and you can cast it so that you have what you need:
Activity activity = (Activity) context;
share
|
improve this answer
...
Android: How to enable/disable option menu item on button click?
...enu() method is called
only once, as described above. The
system keeps and re-uses the Menu you
define in this method until your
activity is destroyed. If you want to
change the Options Menu any time after
it's first created, you must override
the onPrepareOptionsMenu() method.
This ...
Boost Statechart vs. Meta State Machine
...tly boost contains two separate libraries for state machines: Statechart and Meta State Machine (MSM). The taglines give very similar descriptions:
...
How do you overcome the svn 'out of date' error?
...
I changed the svn:ignore property of a folder, and started getting the out of date error. But as you said, just updating it worked.
– Sushant
Oct 21 '09 at 6:49
...