大约有 48,000 项符合查询结果（耗时：0.0487秒） [XML]
Regular expression for a hexadecimal number?
...
answered Feb 10 '12 at 1:10
Steven SchroederSteven Schroeder
4,72611 gold badge1818 silver badges1515 bronze badges
...
How do I list all versions of a gem available at a remote site?
... | grep -o '\((.*)\)$' \
| tr -d '() ' \
| tr ',' "\n" \
| sort
0.0.10
0.1.0
0.1.1
# etc.
To make this a bit more re-usable, you could write some functions (pardon my limited bash skills):
function extract_gem_versions() {
echo "$1" \
| grep -o '\((.*)\)$' \
| tr -d '() ' \
...
Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
... |
edited Aug 2 '17 at 10:42
a_horse_with_no_name
399k6969 gold badges612612 silver badges695695 bronze badges
...
What's the simplest way to subtract a month from a date in Python?
...f not m: m = 12
d = min(date.day, [31,
29 if y%4==0 and (not y%100==0 or y%400 == 0) else 28,
31,30,31,30,31,31,30,31,30,31][m-1])
return date.replace(day=d,month=m, year=y)
>>> for m in range(-12, 12):
print(monthdelta(datetime.now(), m))
2009-08-06 16:12...
How to get Bitmap from an Uri?
...
answered Oct 7 '10 at 8:46
Vidar VestnesVidar Vestnes
40.6k2727 gold badges8181 silver badges9696 bronze badges
...
How to randomly sort (scramble) an array in Ruby?
...by 1.8.7 too.
– Brian Armstrong
Aug 10 '10 at 22:08
That's utterly awesome.
– sidney
...
switch() statement usage
...uq max
1 test1("mean") 709 771 864 951 16122411
2 test2("mean") 1007 1073 1147 1223 8012202
> microbenchmark(test1('trimmed'), test2('trimmed'), times=1e6)
Unit: nanoseconds
expr min lq median uq max
1 test1("trimmed") 733 792 843 944 60440833
2 test2(...
Get path from open file in Python
...
TadeckTadeck
110k2222 gold badges137137 silver badges184184 bronze badges
...
Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
...you won't need to specify the dtype)
In [24]: s = Series([Timestamp('20130101'),np.nan,Timestamp('20130102 9:30')],dtype='M8[ns]')
In [25]: s
Out[25]:
0 2013-01-01 00:00:00
1 NaT
2 2013-01-02 09:30:00
dtype: datetime64[ns]``
In [26]: pd.isnull(s)
Out[26]:
0 False
1 ...
Natural Sort Order in C#
...te info
– linquize
Jul 30 '12 at 15:10
2
FYI, if you inherit from Comparer<T> instead of im...