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ROW_NUMBER() in MySQL
...the single highest col3 for each (col1, col2) pair.
That's a groupwise maximum, one of the most commonly-asked SQL questions (since it seems like it should be easy, but actually it kind of isn't).
I often plump for a null-self-join:
SELECT t0.col3
FROM table AS t0
LEFT JOIN table AS t1 ON t0.col...
Why is a boolean 1 byte and not 1 bit of size?
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Actually, the four x86 instructions bt, bts, btr and btc can address single bits!
– fredoverflow
Jan 7 '11 at 16:07
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jQuery how to bind onclick event to dynamically added HTML element [duplicate]
... to dynamically inject some html (like a ul li of pictures loaded with ajax of infinite scroll stuff) and already having buttons bound to some action (like a lightbox) it's much more comfortable.
– Edoardoo
May 29 '14 at 9:58
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Get a list of resources from classpath directory
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Custom Scanner
Implement your own scanner. For example:
private List<String> getResourceFiles(String path) throws IOException {
List<String> filenames = new ArrayList<>();
try (
InputStream in = getResourceAsStream(path);
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'str' object does not support item assignment in Python
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@aix: That was literally within a few seconds of each other. :D
– Joel Cornett
May 17 '12 at 7:31
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Sublime text 2 - find and replace globally ( all files and in all directories )
Is there any way to find and replace text string automatically in all folder's files ?
2 Answers
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What are the underlying data structures used for Redis?
... for a simple reason: for every Redis operation you'll find the time complexity in the documentation and, if you have the set of operations and the time complexity, the only other thing you need is some clue about memory usage (and because we do many optimizations that may vary depending on data, th...
How do you increase the max number of concurrent connections in Apache?
What httpd conf settings do I need to change to increase the max number of concurrent connections for Apache? NOTE: I turned off KeepAlive since this is mainly an API server.
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Hibernate dialect for Oracle Database 11g?
...h org.hibernate.dialect.Oracle10gDialect class link (applies to hiernate 4.x too)
– bmichalik
Dec 17 '13 at 12:53
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Feedback on using Google App Engine? [closed]
... App Engine is running on Python with Django built right in - gives me an excuse to try that platform... but my question is this:
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