大约有 47,000 项符合查询结果（耗时：0.0588秒） [XML]
Formatting “yesterday's” date in python
...ort date, timedelta
>>> yesterday = date.today() - timedelta(days=1)
>>> yesterday.strftime('%m%d%y')
'110909'
share
|
improve this answer
|
follow
...
How to get execution time in rails console?
...
|
edited Jul 20 '19 at 4:28
Jeremy Baker
3,04833 gold badges2121 silver badges2525 bronze badges
...
Error: Could not create the Java Virtual Machine Mac OSX Mavericks
I just installed the latest Java SDK 7-67 from Oracle on the Mac 10.9.4. I then ran the command java -v in Terminal and I get this message:
...
Extract a number from a string (JavaScript)
...
21 Answers
21
Active
...
How to split a sequence into two pieces by predicate?
...
195
By using partition method:
scala> List(1,2,3,4).partition(x => x % 2 == 0)
res0: (List...
How to add a new row to an empty numpy array
...4)
Then be sure to append along axis 0:
arr = np.append(arr, np.array([[1,2,3]]), axis=0)
arr = np.append(arr, np.array([[4,5,6]]), axis=0)
But, @jonrsharpe is right. In fact, if you're going to be appending in a loop, it would be much faster to append to a list as in your first example, then ...
Swift Beta performance: sorting arrays
...
461
tl;dr Swift 1.0 is now as fast as C by this benchmark using the default release optimisation lev...
Bash foreach loop
...
answered Nov 12 '10 at 8:35
Greg HewgillGreg Hewgill
783k167167 gold badges10841084 silver badges12221222 bronze badges
...
pandas dataframe columns scaling with sklearn
...
221
I am not sure if previous versions of pandas prevented this but now the following snippet works ...
How do I use vi keys in ipython under *nix?
...
166
In case someone's wandering in here recently, IPython 5.0 switched from readline to prompt_too...