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How do I count the number of occurrences of a char in a String?
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I had an idea similar to Mladen, but the opposite...
String s = "a.b.c.d";
int charCount = s.replaceAll("[^.]", "").length();
println(charCount);
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Should MySQL have its timezone set to UTC?
...negative values from FROM_UNIXTIME
Sources:
https://bugs.mysql.com/bug.php?id=68861
http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html
http://dev.mysql.com/doc/refman/5.1/en/datetime.html
http://en.wikipedia.org/wiki/Coordinated_Universal_Time
http://shafiqissani.wordpress.com/2...
How to get “their” changes in the middle of conflicting Git rebase?
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I'm sure there's a good reason why merge and rebase have opposite meaning for "ours" and "theirs", but consistency would have been so much better.
– laurent
Jul 23 at 15:32
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How do I enable/disable log levels in Android?
...G messages will be shown, while WARNs won't? wouldn't you normally want to opposite?
– Sam
Nov 22 '12 at 11:44
15
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Removing all non-numeric characters from string in Python
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That does the opposite. I think you mean "not c.isdigit()"
– Ryan R. Rosario
Aug 8 '09 at 17:19
7
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Sort an Array by keys based on another Array?
Is it possible in PHP to do something like this? How would you go about writing a function? Here is an example. The order is the most important thing.
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Converting from Integer, to BigInteger
...ou can go the house next door by walking next door, or you could go in the opposite direction and go nearly all the way around the globe. You'd still get there, and if you have a fast rocket-plane, you might not notice the time it took, but it's wasteful, and it does take some time longer.
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Web Application Problems (web.config errors) HTTP 500.19 with IIS7.5 and ASP.NET v2
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The IIS URL Rewrite module is available on the IIS website.
– Uwe Keim
Mar 11 '12 at 10:58
5
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Explanation of BASE terminology
... certain databases, usually NoSQL databases. It's often referred to as the opposite of ACID .
6 Answers
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MySQL: Fastest way to count number of rows
...ach time you try to count all rows. (based on primary key's column)
Using PHP to count rows is not very smart, because you have to send data from mysql to php. Why do it when you can achieve the same on the mysql side?
If the COUNT(*) is slow, you should run EXPLAIN on the query, and check if inde...