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Getting output of system() calls in Ruby
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You can do expression evaluation just as you would with regular strings: ls #{filename}.
– Craig Walker
Dec 27 '09 at 17:38
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Having the output of a console application in Visual Studio instead of the console
... to make the Trace output go to the Immediate window so it doesn't get all mixed up with the debug crap.
– Gabe
Mar 30 '10 at 3:41
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How to check if a file exists in a folder?
... Noe that this answer returns false if the user does not have permission to read the file. So it does more than just checkinf if the file exists in a folder. You might want to use DirectoryInfo.GetFiles() and enumerate the result.
– ogborstad
Feb 10 '15 a...
How do I hide .class files from the Open Resource dialog in Eclipse?
...r to edit folder properties, and check the 'Derived' checkbox. If they're mixed with your '.java' files...tough luck, you'll need to set the derived property on each '.class' file by hand.
As far as I can tell there's no way to mark class files as derived resources globally for the workspace, but ...
Python, compute list difference
...oice to push reduce and and alternate impl of filter into functools. The mixed functional, OO and procedural nature of python has always been, IMO, one of its strengths.
– Kevin
Jun 20 '18 at 17:43
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What is the difference between new/delete and malloc/free?
...lementation detail, which is another reason that malloc and new can not be mixed.
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Setting “checked” for a checkbox with jQuery
... performance. To me, coding using a common API makes it more readable than mixing native API and jQuery APIs. I'd stick with jQuery.
– Katie Kilian
May 4 '12 at 16:28
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Why does PostgreSQL perform sequential scan on indexed column?
...ster than an index scan.
This is because an index scan requires several IO operations for each row (look up the row in the index, then retrieve the row from the heap). Whereas a sequential scan only requires a single IO for each row - or even less because a block (page) on the disk contains more...
Naming “class” and “id” HTML attributes - dashes vs. underlines [closed]
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Either example is perfectly valid, you can even throw into the mix ":" or "." as separators according to the w3c spec. I personally use "_" if it is a two word name just because of its similarity to space.
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Random record in ActiveRecord
...bility of selection and support for tables with deleted rows. You can even mix it with constraints.
User.where(favorite_day: "Friday").pluck(:id)
And thereby pick a random user who likes fridays rather than just any user.
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