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How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
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You are so close! All you need to do is select BOTH the home and its max date time, then join back to the topten table on BOTH fields:
SELECT tt.*
FROM topten tt
INNER JOIN
(SELECT home, MAX(datetime) AS MaxDateTime
FROM topten
GROUP BY home) groupedtt
ON tt.home = groupe...
Why is 'this' a pointer and not a reference?
I was reading the answers to this question C++ pros and cons and got this doubt while reading the comments.
2 Answers
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Why do I get the error “Unsafe code may only appear if compiling with /unsafe”?
...nsafe switch on.
Open the properties for the project, go to the Build tab and check the Allow unsafe code checkbox.
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Most efficient way to remove special characters from string
...Regular expression: 294.4 ms.
Edit 2:
I added the distinction between A-Z and a-z in the code above. (I reran the performance test, and there is no noticable difference.)
Edit 3:
I tested the lookup+char[] solution, and it runs in about 13 ms.
The price to pay is, of course, the initialization of...
character showing up in files. How to remove them?
...but a BOM with the bytes reversed. It could happen on any platform, if you convert UTF-16 to UTF-8 and get the byte-order wrong (even though the purpose of the BOM is to prevent that error!)
– tripleee
Nov 24 '14 at 16:38
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python pandas dataframe to dictionary
I've a two columns dataframe, and intend to convert it to python dictionary - the first column will be the key and the second will be the value. Thank you in advance.
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Resize Google Maps marker icon image
...erals support the same parameters as MarkerImage, allowing
you to easily convert a MarkerImage to an Icon by removing the
constructor, wrapping the previous parameters in {}'s, and adding the
names of each parameter.
Phillippe's code would now be:
var icon = {
url: "../res/sit_marron....
Colorize logs in eclipse console
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What about use Logback and its property converter and log everything in log4j, that may allow you see the differents levels on differents colors.
Good luck!
EDIT: the eclipse plugin
shar...
How to make type=“number” to positive numbers only
...001" will help in most cases. More than 6 decimal places, JavaScript will convert it to exponent format.
– MarkMYoung
Jun 2 '16 at 20:32
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Places where JavaBeans are used?
What is a JavaBean and why do I need it? Since I can create all apps with the class and interface structure? Why do I need beans? And can you give me some examples where beans are essential instead of classes and interfaces?
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