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Why do Java webapps use .do extension? Where did it come from?
...oach will be described
below.
Prefix matching means that you want
all URLs that start (after the context
path part) with a particular value to
be passed to this servlet. Such an
entry might look like this:
<servlet-mapping>
<servlet-name>action</servlet-name>
...
Amazon S3 direct file upload from client browser - private key disclosure
...mazon S3 via REST API using only JavaScript, without any server-side code. All works fine but one thing is worrying me...
9...
How to retrieve the first word of the output of a command in bash?
...der to allow word expansion
echo ${array[0]} # You can retrieve any word. Index runs from 0 to length-1
Also, you can directly read arrays in a pipe-line:
echo "word1 word2" | while read -a array; do echo "${array[0]}" ; done
...
Dynamic array in C#
...
Not worth it, as long as you'are using indexer.
– aaimnr
Apr 15 '11 at 9:56
2
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How can I check if a value is a json object?
...ly string values through ajax (which can be fairly useful if you are using PHP or ASPX to process ajax requests and might or might not return JSON depending on conditions)
The solution is quite simple, you can do the following to check if it was a valid JSON return
var IS_JSON = true;
...
Cannot add or update a child row: a foreign key constraint fails
... Referential integrity is supported by the presence of the correct index entries. As long as you've got your keys and indexes right, you should be able to disable the key check during a bulk input.
– Vernon Keenan
Jan 28 at 20:23
...
How to run a background task in a servlet based web application?
... your job here which should run every 5 seconds.
}
}
Yes, that's really all. The container will automatically pickup and manage it.
EJB unavailable? Use ScheduledExecutorService
If your environment doesn't support EJB (i.e. you're not using not a real Java EE server, but a barebones servle...
Differences between action and actionListener
...just specify exactly that string in the action attribute. Thus, this is totally clumsy:
<h:commandLink value="Go to next page" action="#{bean.goToNextpage}" />
With this senseless method returning a hardcoded string:
public String goToNextpage() {
return "nextpage";
}
Instead, just put t...
Why use Ruby instead of Smalltalk? [closed]
...hrough its adolescence. There are a lot of similarities between Ruby and Smalltalk -- maglev is a testament to that. Despite having a more unusual syntax, Smalltalk has all (if not more) of the object-oriented beauty of Ruby.
...
What is normalized UTF-8 all about?
....
Compatibility Normalization
Unicode also includes many characters that really do not belong, but were used in legacy character sets. Unicode added these to allow text in those character sets to be processed as Unicode, and then be converted back without loss.
Compatibility normalization converts t...