Well for me, calling push with only one parameter is quite obvious. At least not less than print without parameter.
The difference is that
print does not alter its operands but
push does. Even ignoring these there is hardly a good reason to use
$_ for
push. For example, in iterators which set the
$_ you might want to use something like:
for(1..100) { push @a;}, but still you would be better going by
push @a,(1..100);
Please, in which chapter did you find that quote in the camel book?
You can find the quote in Chapter 28-Special Names, page 659.
