大约有 43,100 项符合查询结果（耗时：0.0443秒） [XML]
Convert Month Number to Month Name Function in SQL
I have months stored in SQL Server as 1,2,3,4,...12. I would like to display them as January,February etc. Is there a function in SQL Server like MonthName(1) = January? I am trying to avoid a CASE statement, if possible.
...
Mapping two integers to one, in a unique and deterministic way
...
18 Answers
18
Active
...
how to check the dtype of a column in python pandas
...
127
You can access the data-type of a column with dtype:
for y in agg.columns:
if(agg[y].dtyp...
Listing all permutations of a string/integer
...
158
First of all: it smells like recursion of course!
Since you also wanted to know the principle,...
Select multiple columns in data.table by their numeric indices
...
185
For versions of data.table >= 1.9.8, the following all just work:
library(data.table)
dt &...
Performance of foreach, array_map with lambda and array_map with static function
...
122
FWIW, I just did the benchmark since poster didn't do it. Running on PHP 5.3.10 + XDebug.
UP...
How to atomically delete keys matching a pattern using Redis
...g like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document says, because of performance maters, keys
command should not use for regular operations in production, this
command is intended for debuggi...
`elif` in list comprehension conditionals
...essions were designed exactly for this sort of use-case:
>>> l = [1, 2, 3, 4, 5]
>>> ['yes' if v == 1 else 'no' if v == 2 else 'idle' for v in l]
['yes', 'no', 'idle', 'idle', 'idle']
Hope this helps :-)
s...