Ruby, its about the concise code
Today I reviewed a co-workers code. And in a couple of minutes we rewrote it to be as concise - yet still expressive - as it could be. This is one of the things I love about ruby.
The original code was something along the lines of
<code class="ruby">def get_new all = get_all remove_old(all) end def remove_old items new_ones =  items.each do |item| new_ones << item if item.is_new end new_ones end </code>
The first rewrite was to change the remove_old method to be more ruby like.
<code class="ruby">def remove_old items items.select do |item| item.is_new end end </code>
But we quickly realized that this could be even more conscise
<code class="ruby">def remove_old items items.select(&:is_new) end </code>
However wrapping a one-liner in another method seemed stupid, so instead we inlined in the calling method
<code class="ruby">def get_new get_all.select(&:is_new) end </code>
Simple, clean… Concise.