https://ruby-china.org/yunshang 路漫漫其修远兮，吾将上下而求索 en-us <p>在后台接收表单参数的时候，有时候我用 parmas[:samething] 时，查找为 nil，用 pamas["samething"] 才可以。困惑的是有时候两者都可以。pamas["parameter_name"] 和 pamas[:parameter_name] 有区别吗？那一种是正规的写法写法 yo</p> yunshang Wed, 24 Feb 2016 18:54:54 +0800 https://ruby-china.org/topics/29086 https://ruby-china.org/topics/29086 <p>我要打印成图片的控制器 <img src="https://l.ruby-china.com/photo/2015/60be46bb197fc20ab404177d0e13b27e.png" title="" alt=""></p> <p>网页的渲染效果 <img src="https://l.ruby-china.com/photo/2015/50fd90673cb94b22fea2fe9252f8c4bf.png" title="" alt=""></p> <p>生成的图片是这个样子 <img src="https://l.ruby-china.com/photo/2015/4f2a47cb13128d0d70d269906a4f530e.png" title="" alt=""></p> yunshang Tue, 01 Sep 2015 17:49:34 +0800 https://ruby-china.org/topics/27158 https://ruby-china.org/topics/27158