在以下代码中,第三行错误：
TypeError：无法将false转换为String
TypeError：无法将false转换为String
- line = "some default text"
- line << " some more text" unless more.empty?
- line << (even_more.empty?) ? " done." : " and even more text"
有什么更好的方法呢？
解决方法
那些parens是必要的,因为<<优先级高于？ (
precedence table).解：
- line << (even_more.empty? ? " done." : " and even more text")
- line = [
- "some default text",("some more text" unless more.empty?),even_more.empty? ? "done." : "and even more text",].compact.join(" ")