alternating

问题 I'm trying to write a haskell function that takes in two lists of integers and generates a list with elements that have been taken alternatingly from the two lists. I have the function: blend xs ys An example: blend [1,2,3] [4,5,6] should return [1,4,2,5,3,6] My logic is to zip the two lists together, generating the pairs of alternate elements, then somehow remove them from their tuples. It's removing them from their tuples that I can't figure out how to implement. 回答1: How about exchanging

来源： https://stackoverflow.com/questions/51363606/merge-streams-to-produce-alternating-sequence-using-lambda-or-stream-api

来源： https://stackoverflow.com/questions/51363606/merge-streams-to-produce-alternating-sequence-using-lambda-or-stream-api

问题 How can I create alternating background colors for listview rows while only using ItemTemplate? I don't want to use AlternateTemplate because I would have to edit both of them everytime i want to change something when all I'm using it for is to create the alternating background colors. So what's a way I could do it using only the ItemTemplate? Thanks! 回答1: If you could consider the alternating colours a progressive enhancement and not absolutely required in all (old) browsers then you could