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Does a dot have to be escaped in a character class (square brackets) of a regular expression?
A dot . in a regular expression matches any single character. In order for regex to match a dot, the dot has to be escaped: \.
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Calling static generic methods
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Python Flask Intentional Empty Response
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must appear in the GROUP BY clause or be used in an aggregate function
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Yes, this is a common aggregation problem. Before SQL3 (1999), the selected fields must appear in the GROUP BY clause[*].
To workaround this issue, you must calculate the aggregate in a sub-query and then join it with itself to get the additional columns you'd need to...
Can I hex edit a file in Visual Studio?
...other tool other than Visual Studio because it's a pain to switch back and forth.
2 Answers
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How to squash all git commits into one?
...t messages you could first do git log > original.log and then edit that for your initial commit message in the new repository:
rm -rf .git
git init
git add .
git commit
or
git log > original.log
# edit original.log as desired
rm -rf .git
git init
git add .
git commit -F original.log
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What does PorterDuff.Mode mean in android graphics.What does it do?
...r shaped pieces of cardboard" overlayed on each other, as well as a scheme for blending the overlapping parts.
The default Android way of composing images is PorterDuff.Mode.SRC_OVER, which equates to drawing the source image/color over the target image. In other words, it does what you would expec...
MySQL get the date n days ago as a timestamp
...B will return a DATETIME or STRING depending on inputs. TIMESTAMP (v2) is forcing it to a TIMESTAMP type. dev.mysql.com/doc/refman/5.1/en/…
– jsh
Apr 2 '14 at 18:39
add a ...
How do you determine which backend is being used by matplotlib?
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Haskell export current module with additional imported module
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