Perl Best Practices [Electronic resources] نسخه متنی

To run a program under the debugger

> perl -dprogram.pl

To set a breakpoint at the current line

DB<1> b

To set a breakpoint at line 42

DB<1> b 42

To continue executing until the next break-point is reached

DB<1> c

To continue executing until line 86

DB<1> c 86

To continue executing until subroutine foo is called

DB<1>c foo

To execute the next statement

DB<1> n

To step into any

s ubroutine call that's part of the next statement

DB<1> s

To run until the current subroutine

r eturns

DB<1> r

To examine the contents of a variable

DB<1> x $variable

To have the debugger watch a variable or expression, and inform you whenever it changes

DB<1>w$variable

DB<1> wexpr($ess)*$ion

To view where you are in the source code

DB<1> v

To view line 99 of the source code

DB<1> v 99

To get helpful hints on the many other features of the debugger

DB<1> |h h