大约有 34,000 项符合查询结果（耗时：0.0666秒） [XML]
List comprehension: Returning two (or more) items for each item
...ort chain; f = lambda x: x + 2; g = lambda x: x ** 2',
number=20)
print timeit(stmt='list(chain.from_iterable(fg(x) for x in xrange(10**6)))',
setup='gc.enable(); from itertools import chain; from __main__ import fg; f = lambda x: x + 2; g = lambda x: x ** 2',
...
Programmatically creating Markdown tables in R with KnitR
... set it
– Yihui Xie
Nov 12 '13 at 6:20
3
@Yihui You are amazing
– isomorphi...
How to change a table name using an SQL query?
...
answered May 20 '09 at 8:21
David MDavid M
67.3k1111 gold badges148148 silver badges180180 bronze badges
...
Is there a “previous sibling” selector?
...
|
edited Jan 20 '15 at 15:12
answered Jan 16 '15 at 22:45
...
How to get the changes on a branch in Git
...D..branch
– jchook
Oct 31 '18 at 15:20
add a comment
|
...
How to use a WSDL
...
Olorunfemi Ajibulu
65677 silver badges2020 bronze badges
answered Aug 19 '09 at 20:48
marc_smarc_s
650k146146 gold b...
Remove NA values from a vector
...It fails and gives -Inf for a d of all NAs.
– user3932000
Aug 1 '19 at 23:27
@user3932000 Just to be clear for others,...
How to compute the sum and average of elements in an array?
...
|
edited Oct 20 '14 at 15:27
Manolis
15711 silver badge1212 bronze badges
answered Apr 28 '...
How to check Oracle database for long running queries
...suser format 'a10'
column module format 'a16'
column program_name format 'a20'
column program format 'a20'
column machine format 'a20'
column action format 'a20'
column sid format '9999'
column serial# format '99999'
column spid format '99999'
set linesize 200
set pagesize 30
select
a.sid,a.serial#,...
Mac OS X Terminal: Map option+delete to “backward delete word”
...s meta key.
Image
On macOS High Sierra 10.13.6, captured on October 23, 2018.
Notes
Many applications (including bash and tcsh) treat Meta-Delete as "backward delete word."
share
|
improve th...