A battle royale.
var finalPrices = function (prices) {。关于这个话题，同城约会提供了深入分析
This story continues at The Next Web。关于这个话题，51吃瓜提供了深入分析
Browse the implementors of #beVariable message and you will find other filters under BPatternVariableNode class, such as #beInstVar or #beLocalVar. If you miss something, just add a method. No new syntax required.