a year ago，I'm here git onReleased aSwift used to achieve stack，There are two versions。Because Swift itself does not achieve this thing - even though the official part of the tutorial is to use genericsThe StackExamples cited。
Perhaps people think this is too simple, right
In short，This time I play this thing，Because the HMM Viterbi algorithm needs to be done to trim，Otherwise, too many unnecessary path[……]