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Create an empty list in python with certain size
... want to create an empty list (or whatever is the best way) that can hold 10 elements.
15 Answers
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Shell equality operators (=, ==, -eq)
... guaranteed to work.
$ a=foo
$ [ "$a" = foo ]; echo "$?" # POSIX sh
0
$ [ "$a" == foo ]; echo "$?" # bash specific
0
$ [ "$a" -eq foo ]; echo "$?" # wrong
-bash: [: foo: integer expression expected
2
(Side note: Quote those variable expansions! Do not leave out the double quotes ab...
Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
...
10 Answers
10
Active
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What is the difference between CMD and ENTRYPOINT in a Dockerfile?
... |
edited May 9 '18 at 20:46
Software Engineer
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Searching for UUIDs in text with regex
...e five equivalent string representations for a GUID:
"ca761232ed4211cebacd00aa0057b223"
"CA761232-ED42-11CE-BACD-00AA0057B223"
"{CA761232-ED42-11CE-BACD-00AA0057B223}"
"(CA761232-ED42-11CE-BACD-00AA0057B223)"
"{0xCA761232, 0xED42, 0x11CE, {0xBA, 0xCD, 0x00, 0xAA, 0x00, 0x57, 0xB2, 0x23}}"
...
How are the points in CSS specificity calculated
... algorithm is 256 or 28.
What this means is that a style specified with 0 ids and 256 class-names will over-ride a style specified with just 1 id. I tested this out with some fiddles:
255 classes are not enough to override 1 id
...but 256 classes are enough to override 1 id
...and 256 tag-name...
Knight's Shortest Path on Chessboard
...ves are connected (value=1), and unavailable moves are disconnected (value=0), the sparse matrix would be like:
(a1,b3)=1,
(a1,c2)=1,
.....
And the shortest path of two points in a graph can be found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm
Pseudo-code from wikipedia-page:
func...
Why does this assert throw a format exception when comparing structures?
...
100
I've got it. And yes, it's a bug.
The problem is that there are two levels of string.Format go...
How to use if - else structure in a batch file?
... to d
copy "%sourceFile%" "%destinationFile%"
)
IF %F%==1 IF %C%==0 (
::moving the file c to d
move "%sourceFile%" "%destinationFile%"
)
IF %F%==0 IF %C%==1 (
::copying a directory c from d, /s: boş olanlar hariç, /e:boş olanlar dahil
xcopy "%sourceCopyDirectory%" "...
What are the main uses of yield(), and how does it differ from join() and interrupt()?
...nd Java 6.
In Java 5, Thread.yield() calls the Windows API call Sleep(0). This
has the special effect of clearing the current thread's quantum and
putting it to the end of the queue for its priority level. In other
words, all runnable threads of the same priority (and those of greater
p...