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How to install a gem or update RubyGems if it fails with a permissions error
I'm trying to install a gem using gem install mygem or update RubyGems using gem update --system , and it fails with this error:
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How is the AND/OR operator represented as in Regular Expressions?
I'm currently programming a vocabulary algorithm that checks if a user has typed in the word correctly. I have the following situation:
The correct solution for the word would be "part1, part2".
The user should be able to enter either "part1" (answer 1), "part2" (answer 2) or "part1, part2" (answer ...
How do I pass a unique_ptr argument to a constructor or a function?
...d I don't know very well how to handle unique_ptr parameters in constructors or functions. Consider this class referencing itself:
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In Bash, how to add “Are you sure [Y/n]” to any command or alias?
In this particular case, I'd like to add a confirm in Bash for
17 Answers
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Convert nullable bool? to bool
...be false, you can do this:
bool newBool = x.HasValue ? x.Value : false;
Or:
bool newBool = x.HasValue && x.Value;
Or:
bool newBool = x ?? false;
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Java Security: Illegal key size or default parameters?
...E) Unlimited Strength Jurisdiction Policy Files 8 Download (only required for versions before Java 8 u162)
Extract the jar files from the zip and save them in ${java.home}/jre/lib/security/.
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Delete specific line number(s) from a text file using sed?
I want to delete one or more specific line numbers from a file. How would I do this using sed?
6 Answers
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Where is my .vimrc file?
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@Nateshbhat: should I keep using /etc/vim/vimrc or copy that to ~/.vimrc? Or can I have both?
– Mohammad Faisal
Jul 23 '19 at 17:26
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Learning Regular Expressions [closed]
...ain them to me in an easy-to-follow manner? If there are any online tools or books, could you also link to them?
1 Answer
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What is Mocking?
...n mock in the dictionary you will find that one of the definitions of the word is something made as an imitation.
Mocking is primarily used in unit testing. An object under test may
have dependencies on other (complex) objects. To isolate the behavior
of the object you want to replace the other obj...