erb去掉末尾换行 -%>使用方法
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http://stackoverflow.com/questions/998979/difference-between-and-in-rails/25617607#25617607
In Ruby 2.1 (not necessarily with Rails), the - removes one trailing newline:
- the newline must be the first char after the
> - no spaces are removed
- only a single newline is removed
- you must pass the
‘-‘option to use it
Examples:
require ‘erb‘
ERB.new("<%= ‘a‘ %>\nb").result == "a\nb" or raise
begin ERB.new("<%= ‘a‘ -%>\nb").result; rescue SyntaxError ; else raise; end
ERB.new("<%= ‘a‘ %>\nb" , nil, ‘-‘).result == "a\nb" or raise
ERB.new("<%= ‘a‘ -%>\nb" , nil, ‘-‘).result == ‘ab‘ or raise
ERB.new("<%= ‘a‘ -%> \nb" , nil, ‘-‘).result == "a \nb" or raise
ERB.new("<%= ‘a‘ -%>\n b" , nil, ‘-‘).result == ‘a b‘ or raise
ERB.new("<%= ‘a‘ -%>\n\nb", nil, ‘-‘).result == "a\nb" or raise以上是关于erb去掉末尾换行 -%>使用方法的主要内容，如果未能解决你的问题，请参考以下文章