摘要:
In Ruby, you check withnil?if an object is nil:article = nilarticle.nil? # => trueempty?checks if an element - like a string or an array f.e. - is em... 阅读全文
摘要:
In Ruby, you check withnil?if an object is nil:article = nilarticle.nil? # => trueempty?checks if an element - like a string or an array f.e. - is em... 阅读全文