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What is the difference between == and equals() in Java?
...dback I received felt pretty much "you are doing the totally wrong thing". Now I am simply wondering how you look at this? Do you have "generic" messages in your quiver, or do you write solely specific comments in such cases?
– GhostCat
Aug 20 '18 at 18:05
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Can git automatically switch between spaces and tabs?
... .git/info/attributes which contains:
*.py filter=tabspace
Linux/Unix
Now run the commands:
git config --global filter.tabspace.smudge 'unexpand --tabs=4 --first-only'
git config --global filter.tabspace.clean 'expand --tabs=4 --initial'
OS X
First install coreutils with brew:
brew install...
Calculate difference between two datetimes in MySQL
...rence between the last login time and the current time (which I get using NOW() ).
3 Answers
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Difference between timestamps with/without time zone in PostgreSQL
...ly in the docs. The difference arises from what the system can reasonably know about the value:
With a time zone as part of the value, the value can be rendered as a local time in the client.
Without a time zone as part of the value, the obvious default time zone is UTC, so it is rendered for that...
Example for boost shared_mutex (multiple reads/one write)?
... has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updating thread could wait for the o...
How to update Identity Column in SQL Server?
... it started
with a big number 10010 and it's related with another table, now I have 200 records and I want to fix this issue before the records increases.
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In the shell, what does “ 2>&1 ” mean?
...file
Mon Jan 7 13:18:21 CET 2013
The file is overwritten each time, well now:
$ set -o noclobber
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDate-WW1xi9: cannot overwrite existing file
Mon Jan 7 13:18:21 CET 2013
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDa...
Ruby / Rails - Change the timezone of a Time, without changing the value
...Suppose the target time to convert is after the D/ST transition while Time.now is before the change. Would that work ?
– Cyril Duchon-Doris
Oct 26 '16 at 18:42
add a comment
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Git - Undo pushed commits
...some commited changes already pushed to remote and pulled from the server. Now, I want to undo those changes. So I could just git checkout to the commit before the changes and commit the new changes, but I'm guessing that there will be problems to push them again to remote. Any suggestion on how s...
Get Output From the logging Module in IPython Notebook
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For anyone trying to do this in Python 3: reload is now imp.reload
– kuzzooroo
Jan 15 '15 at 17:09
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