大约有 20,000 项符合查询结果（耗时：0.0351秒） [XML]
Rotating a two-dimensional array in Python
...more in the very beautiful and clever one-liner you've posted.
To quickly test it you can copy / paste it here:
http://www.codeskulptor.org/
triangle = [[0,0],[5,0],[5,2]]
coordinates_a = triangle[0]
coordinates_b = triangle[1]
coordinates_c = triangle[2]
def rotate90ccw(coordinates):
print "...
How to get all properties values of a JavaScript Object (without knowing the keys)?
...
Why would you need to test with hasOwnProperty()? How would the key be iterated over within the loop of that object hasn't got the property?
– 1252748
Aug 25 '14 at 1:16
...
What is the relation between BLAS, LAPACK and ATLAS
...org/blas/blast-forum, but (a) there's no enforcement--a standard without a test suite isn't really a standard--and (b) I don't think that anyone implements the full set of interfaces described by that document. It's, uh, aspirational.
– Stephen Canon
Nov 10 '19...
What generates the “text file busy” message in Unix?
...ns:
openat(AT_FDCWD, "sleep.out", O_WRONLY) = -1 ETXTBSY (Text file busy)
Tested on Ubuntu 18.04, Linux kernel 4.15.0.
The error does not happen if you unlink first
notbusy.c
#define _XOPEN_SOURCE 700
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h&g...
How do I use a file grep comparison inside a bash if/else statement?
.... error
fi
For the record, [ expr ] is a shell builtin† shorthand for test expr.
Since grep returns with status 0 in case of a match, and non-zero status in case of no matches, you can use:
if grep -lq '^MYSQL_ROLE=master' ; then
# do one thing
else
# do another thing
fi
Note the us...
Unusual shape of a textarea?
...dn't work for me. The text goes below polygon and stays hidden below it. I tested with Chromium 49, Firefox 44
– deathangel908
Mar 5 '16 at 17:04
...
Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant f
...mething from the XIB is cached on the simulator, which is a pain if you're testing upgrades since you actually don't want to have to delete the old app.
– Carlos P
Jul 31 '13 at 11:14
...
What is the difference between buffer and cache memory in Linux?
...
I have tested this using a simple python program that writes large amounts of blocks. What happens is that the cache gets filled up as reported by free -w -h, not the buffers column. I think the cache column counts both disk writes ...
Removing a model in rails (reverse of “rails g model Title…”)
...
Try this
rails destroy model Rating
It will remove model, migration, tests and fixtures
share
|
improve this answer
|
follow
|
...
How to check for Is not Null And Is not Empty string in SQL server?
...ine)
select iif('xxx' > '', 'true', 'false'); -- true
--
--
-- NOTE - test that tab and newline is processed as expected:
select 'x x' -- tab
select 'x
x' -- newline
share
|
improve this an...