大约有 13,916 项符合查询结果（耗时：0.0269秒） [XML]
Unique combination of all elements from two (or more) vectors
...
this maybe what you are after
> expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
...
Symbolic link to a hook in git
...so relative paths should be relative to that directory. This is more self-explanatory if you first cd into .git/hooks before making the symlink, and figure out the relative path from there.
– Eliot
Feb 6 '14 at 19:57
...
How do I specify “close existing connections” in sql script
...ine to me (I need to constantly recreate the db).
– 2xMax
Mar 15 '13 at 13:48
|
show 4 more comments
...
import module from string variable
...be a bit hard to understand.
If you change
i = __import__('matplotlib.text')
to
i = __import__('matplotlib.text', fromlist=[''])
then i will refer to matplotlib.text.
In Python 2.7 and Python 3.1 or later, you can use importlib:
import importlib
i = importlib.import_module("matplotlib.tex...
Read a zipped file as a pandas DataFrame
...docs:
compression : {‘infer’, ‘gzip’, ‘bz2’, ‘zip’, ‘xz’, None}, default ‘infer’
For on-the-fly decompression of on-disk data. If ‘infer’ and filepath_or_buffer is path-like, then detect compression from the following extensions: ‘.gz’, ‘.bz2’, ‘.zip’, o...
jQuery’s .bind() vs. .on()
...obably -- there's little reason to remove them, since they just map to an existing function. On the other hand, upgrading by a major version number means you can do just about anything to the API, since backwards compatibility is not necessarily guaranteed at that point. Just sayin'.
...
How to check if a function exists on a SQL database
I need to find out if a function exists on a database, so that I can drop it and create it again. It should basically be something like the following code that I use for stored procedures:
...
How to upgrade Eclipse for Java EE Developers?
...> Install/Update > Available Software Sites > Add...
Name: Oxygen
Location: http://download.eclipse.org/releases/oxygen/
Then tell Eclipse to look for updates: Help > Check for updates.
After the installation, Eclipse will restart and show the old splash screen. Next time ...
Spring Java Config: how do you create a prototype-scoped @Bean with runtime arguments?
...guments that are only obtainable at runtime. Consider the following code example (simplified for brevity):
7 Answers
...