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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...
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 to ignore HTML element from tabindex?
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edited May 1 at 14:20
dman
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Can JSON start with “[”?
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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 ...
How to compute the similarity between two text documents?
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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. ...
Browser support for URLs beginning with double slash
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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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“Could not find any information for class named ViewController”
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Write a program that will surely go into deadlock [closed]
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UPDATE: This question was the subject of my blog in January 2013. Thanks for the great question!
How can we write a program that will always go into deadlock no matter how the threads are scheduled?
Here's an example in C#. Note that the program appears to contain no locks and...