in reply to Debugger Tutorials
What really made me start making better use of the debugger is Effective Perl Programming by Hall and Schwartz. One of their recommendations I liked best was to use the debugger as an interactive Perl environment. That is, just type: perl -d -e 0 and any Perl you enter at the prompt will be executed. Combine this with the debugger's x command, and you have a nice way of, for example, analyzing data structures.
Don't be overwhelmed by the ton of commands that appear in the help. I hardly ever use more than these:
- x: nicely formatted display of any variable: scalar, array, or hash
- p: print the argument, like the built-in
- w: show a 10-line window around the current line.
- s and n: step the program, optionally stepping over an entire sub
- b: break execution at line
- c: continue executing until reaching line
- q: quit (kinda necessary, that one)