大约有 16,400 项符合查询结果（耗时：0.0205秒） [XML]
Transpose list of lists
...
How about
map(list, zip(*l))
--> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
For python 3.x users can use
list(map(list, zip(*l)))
Explanation:
There are two things we need to know to understand what's going on:
The signature of zip: ...
How to run Ruby code from terminal?
I need to run a few lines of Ruby code from terminal, but I can't find the needed parameter for it.
2 Answers
...
HashMap get/put complexity
We are used to saying that HashMap get/put operations are O(1). However it depends on the hash implementation. The default object hash is actually the internal address in the JVM heap. Are we sure it is good enough to claim that the get/put are O(1) ?
...
A TwoWay or OneWayToSource binding cannot work on the read-only property
...ly property I need to display in a textbox, and getting this error at runtime. I've set IsEnabled="False" , IsReadOnly="True" - no luck.
Other searches say the readonly should fix it, but not for me.
I've got an ugly workaround by adding a dummy setter...
...
MySQL: Order by field size/length
...
SELECT * FROM TEST ORDER BY LENGTH(description) DESC;
The LENGTH function gives the length of string in bytes. If you want to count (multi-byte) characters, use the CHAR_LENGTH function instead:
SELECT * FROM TEST ORDER BY CHAR_LENGTH...
Javascript Reduce an empty array
When I reduce the array, I am trying to get the number zero, but I dont clearly understand the behaviour of the function
2 ...
Eclipse WTP vs sydeo, “ serves modules without publishing ”
I have the problem to find the performances of the plugin sysdeo by using the integrated plugin WTP of eclipse.
2 Answers
...
Quick search on filename
...
share
|
improve this answer
|
follow
|
edited Aug 24 '14 at 12:48
Anton Dozortsev
...
Why does ~True result in -2?
...ue) is 1.
1 is:
00000001
and ~1 is:
11111110
Which is -2 in Two's complement1
1 Flip all the bits, add 1 to the resulting number and interpret the result as a binary representation of the magnitude and add a negative sign (since the number begins with 1):
11111110 → 00000001 → 00000010 ...
What is the HTML tag “div” short for?
...
http://www.w3.org/TR/REC-html32#block
Document division
share
|
improve this answer
|
follow
|
...