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Get record counts for all tables in MySQL database
...n SQL optimization. You'll need to use COUNT(*) for exact counts (which is more expensive).
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INSERT IF NOT EXISTS ELSE UPDATE?
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Add text to Existing PDF using Python
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I recommend using PyPDF2 since it is more updated, also check their sample code: github.com/mstamy2/PyPDF2/blob/…
– blaze
Apr 23 '15 at 4:06
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Disable Required validation attribute under certain circumstances
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How can I override Bootstrap CSS styles?
...oints)
Among two selector styles browser will always choose the one with more weight. Order of your stylesheets only matters when priorities are even - that's why it is not easy to override Bootstrap.
Your option is to inspect Bootstrap sources, find out how exactly some specific style is defined...
How to correctly close a feature branch in Mercurial?
... branch. The second one leaves no open heads/branches, but it requires one more auxiliary commit. One may combine the last actual commit to the feature branch with this extra commit using --close-branch, but one should know in advance which commit will be the last one.
Update: Since Mercurial 1.5 y...
SQLAlchemy: cascade delete
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Aha, this is it. I wish the documentation was more explicit about this!
– carl
Feb 17 '11 at 20:52
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Escape a string for a sed replace pattern
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Warning: This does not consider newlines. For a more in-depth answer, see this SO-question instead. (Thanks, Ed Morton & Niklas Peter)
Note that escaping everything is a bad idea. Sed needs many characters to be escaped to get their special meaning. For example, if yo...
What's wrong with using $_REQUEST[]?
...ug when you have just a couple of users with old cookies you don't use any more hanging around and breaking the forms in ways no-one else can reproduce.
You can change this behaviour to the much more sensible GP (no C) order with the request_order config in PHP 5.3. Where this is not possible, I pe...
How to map a composite key with JPA and Hibernate?
...l point of view, there are no differences
@EmbeddedId somehow communicates more clearly that the key is a composite key and IMO makes sense when the combined pk is either a meaningful entity itself or it reused in your code.
@IdClass is useful to specify that some combination of fields is unique but...