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...u are exposing your class through a library that others will use, you generally want to expose it via interfaces rather than concrete implementations. This will help if you decide to change the implementation of your class later to use a different concrete class. In that case the users of your lib...
How to update column with null value
...ed Oct 6 '10 at 8:11
Daniel VassalloDaniel Vassallo
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What is the proper REST response code for a valid request but an empty data?
...ch may want to indicate success without having to return something. (Especially in cases like DELETE or POSTs that don't require feedback).
The answer, therefore, to your question is use 404 in your case. 204 is a specialized reponse code that you shouldn't often return to a browser in response to...
Best way to compare 2 XML documents in Java
I'm trying to write an automated test of an application that basically translates a custom message format into an XML message and sends it out the other end. I've got a good set of input/output message pairs so all I need to do is send the input messages in and listen for the XML message to come ou...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...ON DUPLICATE KEY UPDATE.
If you use INSERT IGNORE, then the row won't actually be inserted if it results in a duplicate key. But the statement won't generate an error. It generates a warning instead. These cases include:
Inserting a duplicate key in columns with PRIMARY KEY or UNIQUE constrain...
Redirect stderr and stdout in Bash
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@Daniel, but this question is specifically about bash
– John La Rooy
Aug 19 '13 at 3:38
3
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How to compare versions in Ruby?
... The Gem::Version... syntax made me thought I would need to install a gem. But it was not required.
– Guillaume
Oct 17 '12 at 17:08
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Maximum on http header values?
Is there an accepted maximum allowed size for HTTP headers? If so, what is it? If not, is this something that's server specific or is the accepted standard to allow headers of any size?
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Error: The processing instruction target matching “[xX][mM][lL]” is not allowed
...ng error
The processing instruction target matching "[xX][mM][lL]" is not allowed.
when an XML declaration is encountered anywhere other than at the top of an XML file.
This is a valid diagnostic message; other XML parsers should issue a similar error message in this situation.
To correct the p...
What is the difference between MacVim and regular Vim?
...itched from TextMate I kind of liked the fact that MacVim supported almost all of the regular shortcuts Mac users are accustomed to. I added some of my own, mimiking TextMate but, since I was working in multiple environments I forced my self to learn the vim way. Now I use both MacVim and Vim almost...