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Can a pointer to base point to an array of derived objects?
I went to a job interview today and was given this interesting question.
3 Answers
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Checking for the correct number of arguments
...s to invoke the script without passing in the correct number of arguments, and checking to make sure the command line argument actually exists and is a directory.
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How do I search within an array of hashes by hash values in ruby?
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Oh! You were the first one! Deleting my answer and +1.
– Milan Novota
Feb 11 '10 at 14:13
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Link latest file on Bitbucket Git repository
...file path/to/file [revision] [linenumber]>>
Just omit the revision and line number parameters, they are optional.
Then, refer to the wiki page everywhere else you'd like link to the read me file.
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Ruby on Rails patterns - decorator vs presenter
...all sorts of talk lately in the Ruby on Rails community about decorators and presenters.
2 Answers
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Executing a command stored in a variable from PowerShell
I have a command that I have build and stored in a variable in PowerShell. This command works if I do a Write-Host and copy and paste into a standard cmd.exe window.
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Rollback to last git commit
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Caveat Emptor - Destructive commands ahead.
Mitigation - git reflog can save you if you need it.
1) UNDO local file changes and KEEP your last commit
git reset --hard
2) UNDO local file changes and REMOVE your last commit
git reset --hard HEAD^
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MySQL WHERE: how to write “!=” or “not equals”?
...answered Jul 10 '12 at 20:53
RolandoMySQLDBARolandoMySQLDBA
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RegEx - Match Numbers of Variable Length
... support the following expression:
\{\d+:\d+\}
The \d is actually shorthand for [0-9], but the important part is the addition of + which means "one or more".
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What does $NON-NLS-1$ mean?
...y silence a warning that Eclipse emits when it encounters string literals (and has been configured to complain).
The idea is that UI messages should not be embedded as string literals, but rather sourced from a resource file (so that they can be translated, proofed, etc). Consequently, Eclipse can ...