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embedding.scala #9

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monkeyshichi opened this issue Oct 25, 2020 · 1 comment
Closed

embedding.scala #9

monkeyshichi opened this issue Oct 25, 2020 · 1 comment

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@monkeyshichi
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monkeyshichi commented Oct 25, 2020 •
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userEmb = user._2.foldRightArray[Float]((row, newEmb) => {
val movieId = row.getAsString
val movieEmb = word2VecModel.getVectors.get(movieId)
if(movieEmb.isDefined){
newEmb.zip(movieEmb.get).map { case (x, y) => x + y }
}else{
newEmb
}
})

老师，这段代码能解释下吗？user._2.foldRightArray[Float],(userEmb) 是什么意思，row, newEmb，这些参数是啥意思 ，movieEmb.get 为啥能这么写，是什么意思，
if(movieEmb.isDefined){
newEmb.zip(movieEmb.get).map { case (x, y) => x + y }
}else{
newEmb
}
这个又是起什么作用？
@monkeyshichi
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解决了

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