George's dev dream port

Today I was trapped by kind of wierd behavior of Ruby's String#split, here's an example: def parse_inline_styles(text) segments = text.split(%r{(</?.*?>)}).reject {|x| x.empty?} segments...

Enumerable#inject是Ruby核心库中的一个简洁而且强大的API，今天读到一段简洁的代码之后，对这个API产生了浓厚的兴趣，索性搜寻一下资料，总结一下它的用法。 代码如下：   def text_at(*args) args.inject(@feed) { |s, r| s.send(:at, r)}.inner_text end 这段代码完成的功能是：取出X...

If you play around array slicing in irb, it will behavior like below:   irb(main):027:0> a = [1,2,3] => [1, 2, 3] irb(main):028:0> a[2,1] => [3] irb(main):029:0> a[4,1] ...