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Understanding checked vs unchecked exceptions in Java
.... these that you should explicitly catch or rethrow) should not be used at all. They were eliminated in C# for example, and most languages don't have them. So you can always throw a subclass of RuntimeException (unchecked exception)
However, I think checked exceptions are useful - they are used whe...
Fetch the row which has the Max value for a column
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This will retrieve all rows for which the my_date column value is equal to the maximum value of my_date for that userid. This may retrieve multiple rows for the userid where the maximum date is on multiple rows.
select userid,
my_date,
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Heroku/GoDaddy: send naked domain to www [closed]
... at the bottom of the "Domain Information" section:
If you do this then all traffic to yourdomain.com will be routed to the Heroku app CNAME (which is the better approach).
One note, however, if you are on the Cedar stack then don't use proxy.heroku.com for the host of your www CNAME. Instead us...
MySQL Database won't start in XAMPP Manager-osx
...wnloaded XAMPP about a month ago and it was working just fine. Today I installed a voice recognition software and then restarted my computer. Ever since, MySQL won't start in my manager-osx application. It doesn't throw me an in the application log. This is what it says:
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The definitive guide to form-based website authentication [closed]
...ns for sound practical auth, and how to avoid the most common security pitfalls.
To HTTPS or not to HTTPS?
Unless the connection is already secure (that is, tunneled through HTTPS using SSL/TLS), your login form values will be sent in cleartext, which allows anyone eavesdropping on the line between ...
How to find out if a Python object is a string?
...r with unicode.
However, you may not need to do explicit type checking at all. "Duck typing" may fit your needs. See http://docs.python.org/glossary.html#term-duck-typing.
See also What’s the canonical way to check for type in python?
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How to change an input button image using CSS?
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Safari 3 and up allow you to style buttons however you want. And to be more compatible, use a <button> instead.
– eyelidlessness
Oct 12 '08 at 16:32
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Changing MongoDB data store directory
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The short answer is that the --dbpath parameter in MongoDB will allow you to control what directory MongoDB reads and writes it's data from.
mongod --dbpath /usr/local/mongodb-data
Would start mongodb and put the files in /usr/local/mongodb-data.
Depending on your distribution and...
Numpy argsort - what is it doing?
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[2, 3, 1, 0] indicates that the smallest element is at index 2, the next smallest at index 3, then index 1, then index 0.
There are a number of ways to get the result you are looking for:
import numpy as np
import scipy.stats as stats
def using_indexed_ass...
Moving decimal places over in a double
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which prints:
12.34
This works because Double.toString(d) performs a small amount of rounding on your behalf, but it is not much. If you are wondering what it might look like without rounding:
System.out.println(new BigDecimal(0.1));
System.out.println(new BigDecimal(x));
prints:
0.100000000...