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IN vs OR in the SQL WHERE Clause
...xed I got these results:
SELECT COUNT(*) FROM t_inner WHERE val IN (1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000);
1 row fetched in 0.0032 (1.2679 seconds)
SELECT COUNT(*) FROM t_inner WHERE val = 1000 OR val = 2000 OR val = 3000 OR val = 4000 OR val = 5000 OR val = 6000 OR val = 7000 OR v...
Can JSON start with “[”?
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225
JSON can be either an array or an object. Specifically off of json.org:
JSON is built on t...
Is it safe to parse a /proc/ file?
...lly atomic, as someone mentioned in another answer -- but only since Linux 2.6.30, which is less than two years old. So even this tiny, trivial file was subject to a race condition until then, and still is in most enterprise kernels. See fs/proc/uptime.c for the current source, or the commit that ...
MySQL - ORDER BY values within IN()
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233
SELECT id, name
FROM mytable
WHERE name IN ('B', 'A', 'D', 'E', 'C')
ORDER BY FIELD(name, 'B',...
How do you completely remove the button border in wpf?
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259
Try this
<Button BorderThickness="0"
Style="{StaticResource {x:Static ToolBar.Button...
makefile:4: *** missing separator. Stop
...nd of line ...
$
ll:ll.c $
^Igcc -c -Wall -Werror -02 c.c ll.c -o ll $@ $<$
## the ^I above means a tab was there before the action part, so this line is ok .
$
clean :$
\rm -fr ll$
## see here there is no ^I which means , tab is not present ....
## in this case y...
How to compute the similarity between two text documents?
...
array([[1. , 0.17668795, 0.27056873, 0. , 0. ],
[0.17668795, 1. , 0.15439436, 0. , 0. ],
[0.27056873, 0.15439436, 1. , 0.19635649, 0.16815247],
[0. , 0. , 0.19635649, 1. ...
Maven – Always download sources and javadocs
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268
Open your settings.xml file ~/.m2/settings.xml (create it if it doesn't exist). Add a section...
In Git, what is the difference between origin/master vs origin master?
...table
You can merge multiple branches...
git merge origin/master hotfix-2275 hotfix-2276 hotfix-2290
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Python ValueError: too many values to unpack [duplicate]
...nto the tuple "k, m", hence the ValueError exception is raised.
In Python 2.x, to iterate over the keys and the values (the tuple "k, m"), we use self.materials.iteritems().
However, since you're throwing the key away anyway, you may as well simply iterate over the dictionary's values:
for m in s...