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How to use Oracle ORDER BY and ROWNUM correctly?
...seqnum
from raceway_input_labo ril
) ril
where seqnum = 1
The outer * will return "1" in the last column. You would need to list the columns individually to avoid this.
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How does the vim “write with sudo” trick work?
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In :w !sudo tee %...
% means "the current file"
As eugene y pointed out, % does indeed mean "the current file name", which is passed to tee so that it knows which file to overwrite.
(In substitution commands, it's slightly different; as :help :% shows, it's equal to 1,$ (the entire file) (th...
Clone contents of a GitHub repository (without the folder itself)
...ectory] parameter is documented in the git clone manual page, which points out that cloning into an existing directory is only allowed if that directory is empty.
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how can you easily check if access is denied for a file in .NET?
...e .Exists() function or checking permissions will force an additional trip out the file system.
In summary, an initial check before trying to open the file is both redundant and wasteful. There is no additional benefit over exception handling, it will actually hurt, not help, your performance, it ...
simulate background-size:cover on or
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This is something I pulled my hair out over for a while, but I came across a great solution that doesn't use any script, and can achieve a perfect cover simulation on video with 5 lines of CSS (9 if you count selectors and brackets). This has 0 edge-cases in w...
Foreign key constraint may cause cycles or multiple cascade paths?
...rver does simple counting of cascade paths and, rather than trying to work out whether any cycles actually exist, it assumes the worst and refuses to create the referential actions (CASCADE): you can and should still create the constraints without the referential actions. If you can't alter your des...
python: SyntaxError: EOL while scanning string literal
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What about concatenating strings and variables?
– Daniel Springer
Sep 12 '16 at 18:16
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Difference between subprocess.Popen and os.system
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If you check out the subprocess section of the Python docs, you'll notice there is an example of how to replace os.system() with subprocess.Popen():
sts = os.system("mycmd" + " myarg")
...does the same thing as...
sts = Popen("mycmd" ...
How to make junior programmers write tests? [closed]
...oard) and "coaching" (looking over the shoulder of the driver and pointing out suggestions, mistakes, etc as they go). It may seem like a waste of resources, but you will find:
That these guys together can produce code plenty fast and of higher quality.
If your junior guy learns enough to "get it...
Regular expression search replace in Sublime Text 2
...ng to this page (though I'm having trouble finding enough examples to work out exactly how an exit mark is used in Sublime2).
– Bobulous
Apr 3 '13 at 20:41
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