scala> val res=lines.map(lambda x :x.split(","))map(lambda x :x[0])
<console>:1: error: ')' expected but '(' found.
val res=lines.map(lambda x :x.split(","))map(lambda x :x[0])
^
<console>:1: error: ';' expected but ')' found.
val res=lines.map(lambda x :x.split(","))map(lambda x :x[0])
^
看来看去还是不明白是哪里有问题