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How to check if a given directory exists in Ruby
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If it matters whether the file you're looking for is a directory and not just a file, you could use File.directory? or Dir.exist?. This will return true only if the file exists and is a directory.
As an aside, a more idiomatic way to write the method would be to take advantage of the fact...
What is the minimum I have to do to create an RPM file?
...with only a couple of dependencies. It has a config file, /etc/foobar.conf and should be installed in /usr/bin/foobar.
9 A...
What is the most elegant way to remove a path from the $PATH variable in Bash?
... @Martin: POSIX does not require this behavior, but does document and allow it: pubs.opengroup.org/onlinepubs/9699919799/basedefs/…
– Fred Foo
Mar 13 '11 at 23:04
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sqlalchemy IS NOT NULL select
...s is a better solution because NULL is not a valid as the RHS of != in SQL and using isnot better conveys your intentions for what you want the generated statement to look like.
– Josh
Sep 2 '16 at 16:04
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initialize a vector to zeros C++/C++11
... postfix: "",
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Are Java static calls more or less expensive than non-static calls?
...ful to know they are at least as fast, if not faster than instance methods and should not be ruled out on a performance basis.
– Will
Oct 21 '17 at 13:11
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Read specific columns from a csv file with csv module?
I'm trying to parse through a csv file and extract the data from only specific columns.
11 Answers
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Is the ternary operator faster than an “if” condition in Java [duplicate]
... readable doesn't mean it matters, perse.
– Jon Egeland
Mar 16 '12 at 22:42
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@Jon: Yes, it doe...
Convert from enum ordinal to enum type
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I implemented this solution and it is not working for me. It returns out the ordinal value is not guaranteed to match the order in which the enumerated types are added. I don't know that is what this answer is advocating, but I wanted to warn people non...
How to add a filter class in Spring Boot?
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When I tried that approach, Filter was created as bean and even was injected to other class but init() method didn't run. Probably, init() works only in 'normal' registering not by spring container. I think, one may use PostConstruct instead of init() but I didn't try that as I r...