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Java Persistence / JPA: @Column vs @Basic
What is the difference between @Column and @Basic annotations in JPA? Can they be used together? Should they be used together? Or does one of them suffice?
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Re-entrant locks in C#
...bject on which the current thread already has a lock will work just fine.
If you start locking on different objects, that's when you have to be careful. Pay particular attention to:
Always acquire locks on a given number of objects in the same sequence.
Always release locks in the reverse sequenc...
How do you clear Apache Maven's cache?
...alls on our projects using Windows Vista or Windows 7 sometimes produce artifacts with the same data as a previous build even though the newer artifact's files should have been updated.
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When should I use uuid.uuid1() vs. uuid.uuid4() in python?
I understand the differences between the two from the docs.
6 Answers
6
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How to reference the initial commit?
...ot use git-log for scripting: use either git-rev-list, or git-log with specified custom format (--format=*<sth>* option).
There is additional problem with your question: there can exist more than one such TAIL root commit (parentless commit) in a repository (even if we discount disconnected b...
How to count instances of character in SQL Column
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Just be aware that if there are more than "N" or "Y" in the string then this could be inaccurate. See nickf's solution for a more robust method.
– Tom H
Dec 7 '09 at 15:28
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Calculating how many minutes there are between two times
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TimeSpan span = endTime.Subtract ( startTime );
Console.WriteLine( "Time Difference (minutes): " + span.TotalMinutes );
Edit:
If are you trying 'span.Minutes', this will return only the minutes of timespan [0~59], to return sum of all minutes from this interval, just use 'span.TotalMinutes'.
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Convert .pfx to .cer
...onvert a .pfx (Personal Information Exchange) file to a .cer (Security Certificate) file? Unless I'm mistaken, isn't a .cer somehow embedded inside a .pfx? I'd like some way to extract it, if possible.
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Parse v. TryParse
What is the difference between Parse() and TryParse()?
8 Answers
8
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How do I edit an incorrect commit message with TortoiseGit?
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If the commit is the head of current branch, that is easy.
Context menu -> Git Commit
Tick "Amend Last Commit" checkbox
Correct your commit message
OK
If the commit is the head of other branch, switch to that branch fi...