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postgresql - add boolean column to table set default
... versions before postgresql 11.
As Craig mentioned on filled tables it is more efficient to split it into steps:
ALTER TABLE users ADD COLUMN priv_user BOOLEAN;
UPDATE users SET priv_user = 'f';
ALTER TABLE users ALTER COLUMN priv_user SET NOT NULL;
ALTER TABLE users ALTER COLUMN priv_user SET DEF...
Split a python list into other “sublists” i.e smaller lists [duplicate]
... len(data), 100)]
If you are using python 2.x instead of 3.x, you can be more memory-efficient by using xrange(), changing the above code to:
chunks = [data[x:x+100] for x in xrange(0, len(data), 100)]
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how to add script src inside a View when using Layout
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Removing MySQL 5.7 Completely [closed]
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For an even more complete uninstall, I would also include the removal of configuration and logs: sudo rm -rf /var/log/mysql and sudo rm -rf /etc/mysql
– Chris
Mar 15 '15 at 17:59
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Close and Dispose - which to call?
...e in the case of SqlConnectionObject is:
An application can call Close more
than one time. No exception is
generated.
If you called Dispose method
SqlConnection object state will be
reset. If you try to call any
method on disposed SqlConnection
object, you will receive exception...
How do I convert a byte array to Base64 in Java?
...).decode(encoded.getBytes()));
println(decoded) // Outputs "Hello"
For more info, see Base64.
Java < 8
Base64 is not bundled with Java versions less than 8. I recommend using Apache Commons Codec.
For direct byte arrays:
Base64 codec = new Base64();
byte[] encoded = codec.encode("Hello".getBy...
Calculating how many minutes there are between two times
...en difference between two times is greater than 1 hour (i.e. 60 minutes or more)
– Asif Mehmood
Jan 31 '17 at 14:09
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targetContentOffsetForProposedContentOffset:withScrollingVelocity without subclassing UICollectionVi
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Deleting an element from an array in PHP
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There are different ways to delete an array element, where some are more useful for some specific tasks than others.
Delete one array element
If you want to delete just one array element you can use unset() or alternatively \array_splice().
Also if you have the value and don't know the key to...
How to find a min/max with Ruby
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@Kaz ...you realize std::max(4, 7) has more "punctuation" than [4, 7].max?
– tckmn
Mar 24 '14 at 22:51
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