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Does a UNIQUE constraint automatically create an INDEX on the field(s)?
... Using SHOW INDEXES FROM customer you can see your unique keys are in fact B-tree type indexes.
A composite index on (email, user_id) is enough, you don't need a separate index on email only - MySQL can use leftmost parts of a composite index. There may be some border cases where the size of an ind...
Why is '397' used for ReSharper GetHashCode override?
...ed up the development process. When you use it to override the equality members of a class, the code-gen it produces for GetHashCode() looks like:
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How to print colored text in Python?
...hat depends on what platform you are on. The most common way to do this is by printing ANSI escape sequences. For a simple example, here's some python code from the blender build scripts:
class bcolors:
HEADER = '\033[95m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m...
IE9 jQuery AJAX with CORS returns “Access is denied”
The following works in all browsers except IE (I'm testing in IE 9).
12 Answers
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Print in one line dynamically
...ke several statements that give standard output without seeing newlines in between statements.
20 Answers
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Xcode 4.2 debug doesn't symbolicate stack call
I have a problem with Xcode 4.2 debugging in an iOS 5 simulator/device. The following code crashes, as expected:
9 Answers
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How to revert a merge commit that's already pushed to remote branch?
git revert <commit_hash> alone won't work. -m must be specified, and I'm pretty confused about it.
16 Answers
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HashMap with multiple values under the same key
Is it possible for us to implement a HashMap with one key and two values. Just as HashMap?
22 Answers
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How can I get around MySQL Errcode 13 with SELECT INTO OUTFILE?
I am trying to dump the contents of a table to a csv file using a MySQL SELECT INTO OUTFILE statement. If I do:
13 Answers...
How do I turn a String into a InputStreamReader in java?
...
ByteArrayInputStream also does the trick:
InputStream is = new ByteArrayInputStream( myString.getBytes( charset ) );
Then convert to reader:
InputStreamReader reader = new InputStreamReader(is);
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