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Is having an 'OR' in an INNER JOIN condition a bad idea?
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This kind of JOIN is not optimizable to a HASH JOIN or a MERGE JOIN.
It can be expressed as a concatenation of two resultsets:
SELECT *
FROM maintable m
JOIN othertable o
ON o.parentId = m.id
UNION
SELECT *
FROM maintable m
JOIN othert...
How to make div background color transparent in CSS
...Opacity=50)"; /* IE 8 */
filter: alpha(opacity=50); /* IE 5-7 */
-moz-opacity: 0.5; /* Netscape */
-khtml-opacity: 0.5; /* Safari 1.x */
opacity: 0.5; /* Good browsers */
Note: these are NOT CSS3 properties
See http://css-tricks.com/snippets/css/cross-browser-...
Erratic hole type resolution
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This might not be what you want (i.e. "Except of using just (x, y) since z = 5 - x - y") but it makes more sense than trying to have some kind of enforced restriction on the type level for allowing valid values.
share
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HSL to RGB color conversion
...ompson
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answered Feb 29 '12 at 3:09
MohsenMohsen
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multiprocessing: sharing a large read-only object between processes?
...ta in the database.
Solution 3B – create a very simple server using werkzeug (or similar) to provide WSGI applications that respond to HTTP GET so the workers can query the server.
Solution 4
Shared filesystem object. Unix OS offers shared memory objects. These are just files that are mappe...
How to iterate over associative arrays in Bash
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Haskell error parse error on input `='
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Sort Dictionary by keys
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let dictionary = [
"A" : [1, 2],
"Z" : [3, 4],
"D" : [5, 6]
]
let sortedKeys = Array(dictionary.keys).sorted(<) // ["A", "D", "Z"]
EDIT:
The sorted array from the above code contains keys only, while values have to be retrieved from the original di...
Git flow release branches and tags - with or without “v” prefix
...Wolla
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Permission denied on accessing host directory in Docker
...docker-1.6 on RHEL, CentOS, and Fedora).
This patch adds support for "z" and "Z" as options on the volume
mounts (-v).
For example:
docker run -v /var/db:/var/db:z rhel7 /bin/sh
Will automatically do the chcon -Rt svirt_sandbox_file_t /var/db
described in the man page.
Even...