When running code under the debugger, local variables were not available while stepping through a method. Instance variables (under “this”) were available.
Solution: Add debug=”true” in ant build script javac tag
Archive for July, 2006
Debug message in stored procedures
dbms_output.put_line(var_nm);
in SQL Navigator 4.3
log4j in eatj.com
The log file path in log4j for eatj.com should be:
/usr/local/shared/tomcat/<username>/logs
How to map an image area with a hole?
In html <area> what’s nohref for? As you might suspect, it’s used to indicate that a region doesn’t do anything when clicked upon– let’s call them “inactive regions.” This sounds like yet another useless concept, but it isn’t. In the first place, you can use this to define regions which will be assigned targets later; in effect, placeholders for the author.
The more interesting use is that you can “cut out” sections of active regions. Assume that you want to create a clickable ring, where the center of the ring (the hole in the middle) is inactive. You could do this as a really complicated polygon, but a much easier way is something like this:
<AREA shape="circle" coords="50,50,20" nohref> <AREA shape="circle" coords="50,50,40" href="page4.html">
The reddish area in Figure 3.2 represents the active region of the image, based on the AREA statements above. Gray represents “dead” space, so nothing will happen if the user clicks there.
This leaves only the question: Why was the inactive region first, instead of second? The HTML specification is quite clear that in cases of overlapping regions, the first AREA tag in the map definition takes precedence over later tags.
This precedence is true in all cases, so in the following circumstance:
<AREA shape="rect" coords="0,0,30,30" href="page1.html"> <AREA shape="rect" coords="20,20,50,50" href="page2.html">
…the overlap between 20,20 and 30,30 will be mapped to page1.html, not page2.html. The dark blue area in Figure 3.3 is the first AREA statement above; the green, the second. Note the way in which the blue region “overlaps” the green.
From “Image Mapping”
