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MIN/MAX vs ORDER BY and LIMIT
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In the worst case, where you're looking at an unindexed field, using MIN() requires a single full pass of the table. Using SORT and LIMIT requires a filesort. If run against a large table, there would likely be a significant difference in percieved performance. As a meaning...
How do I allow HTTPS for Apache on localhost?
...er much hairpulling...
I found that my Apache install comes with openssl.exe which is helpful. If you don't have a copy, you'll need to download it. My copy was in Apache2\bin folder which is how I reference it below.
Steps:
Ensure you have write permissions to your Apache conf folder
Open a c...
Why does std::getline() skip input after a formatted extraction?
...you provided yourself but rather with the default behavior std::getline() exhibits. When you provided your input for the name (std::cin >> name), you not only submitted the following characters, but also an implicit newline was appended to the stream:
"John\n"
A newline is always appended t...
How to check if std::map contains a key without doing insert?
...and I'm sure most reasonable systems), map::count is implemented as find(__x) == end() ? 0 : 1;. For multimap the you may have a performance argument, but that's not OP's question and I still prefer elegance.
– Potatoswatter
Jun 3 '11 at 23:09
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How can I find the location of origin/master in git, and how do I change it?
...version to Git. I followed the tutorial here: http://www.simplisticcomplexity.com/2008/03/05/cleanly-migrate-your-subversion-repository-to-a-git-repository/
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How to divide flask app into multiple py files?
... answered Aug 16 '12 at 20:09
pixelistikpixelistik
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Python dict how to create key or append an element to key?
I have an empty dictionary. Name: dict_x
It is to have keys of which values are lists.
5 Answers
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What is “above-the-fold content” in Google Pagespeed?
Until recently, my site (www.heatexchangers.ca) scored 98% on Google Page Speed. There were a couple of things I could do nothing about such as the query string from web fonts. I was very happy with this as this represented all that I could do.
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What does tree-ish mean in Git?
...rect way to specify a (sub)directory in Git is to use this
"tree-ish" syntax (item #15 from the Git revisions documentation):
<rev>:<path>, e.g. HEAD:README, :README, master:./README
A suffix : followed by a path names the blob or tree at the given path in
the tree-ish object ...
How to override and extend basic Django admin templates?
How do I override an admin template (e.g. admin/index.html) while at the same time extending it (see https://docs.djangoproject.com/en/dev/ref/contrib/admin/#overriding-vs-replacing-an-admin-template )?
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