What is the difference between [% %] and [%- -%] in Template Toolkit?

Question

Template Toolkit中[% %]和[%- -%]之间有什么区别？

Answer 1

The - automatically removes some whitespace from before/after the directive tag.

See Template::Manual::Syntax :

You can add - or + to the immediate start or end of a directive tag to control the whitespace chomping options. See the PRE_CHOMP and POST_CHOMP options for further details.

See Template::Manual::Config for good examples of the effects with and without pre and post chomping.