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Closing JDBC Connections in Pool
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Yes, certainly you need to close the pooled connection as well. It's actually a wrapper around the actual connection. It wil under the covers release the actual connection back to the pool. It's further up to the pool to decide whether the actual connection will actually be closed or be reused for...
Can you make just part of a regex case-insensitive?
...ase-insensitive by using the (?i:) pattern modifier.
Modern regex flavors allow you to apply modifiers to only part of the regular expression. If you insert the modifier (?ism) in the middle of the regex, the modifier only applies to the part of the regex to the right of the modifier. You can turn ...
SQLAlchemy: What's the difference between flush() and commit()?
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A Session object is basically an ongoing transaction of changes to a database (update, insert, delete). These operations aren't persisted to the database until they are committed (if your program aborts for some reason in mid-session transaction, any...
How to configure MongoDB Java driver MongoOptions for production use?
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Updated to 2.9 :
autoConnectRetry simply means the driver will automatically attempt to reconnect to the server(s) after unexpected disconnects. In production environments you usually want this set to true.
connectionsPerHost are the amount of physical connections a single Mongo instance (it's si...
Create RegExps on the fly using string variables
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With string literals this is easy enough.
Not really! The example only replaces the first occurrence of string_to_replace. More commonly you want to replace all occurrences, in which case, you have to convert the string into a global (/.../g) RegExp. You can do this from a...
What exactly do “u” and “r” string flags do, and what are raw string literals?
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There's not really any "raw string"; there are raw string literals, which are exactly the string literals marked by an 'r' before the opening quote.
A "raw string literal" is a slightly different syntax for a string literal, in which a ba...
Push git commits & tags simultaneously
...h . Pushing tags should be a conscious choice since you don't want accidentally push one. That's fine. But is there a way to push both together? (Aside from git push && git push --tags .)
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What does @@variable mean in Ruby?
...the classes; setting the value in an instance of one changes the value for all other instances of that class and even child classes, where a variable named @shared, with one @, would not be.
[Update]
As Phrogz mentions in the comments, it's a common idiom in Ruby to track class-level data with an ...
How do you suppress output in IPython Notebook?
...nly want to suppress output from particular lines of code in the cell, not all lines. Thanks
– Confounded
Nov 15 '19 at 11:15
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Can I make fast forwarding be off by default in git?
I can't really ever think of a time when I would use git merge rather than git rebase and not want to have a commit show up. Is there any way to configure git to have fast forwarding off by default? The fact that there's an --ff option would seem to imply that there's a way, but I can't se...