Scala list of tuples of different size zip issues? -

hi 2 lists follows:

val = list((1430299869,"a",4200), (1430299869,"a",0))  val b = list((1430302366,"b",4100), (1430302366,"b",4200), (1430302366,"b",5000), (1430302366,"b",27017), (1430302366,"b",80), (1430302366,"b",9300), (1430302366,"b",9200), (1430302366,"a",5000), (1430302366,"a",4200), (1430302366,"a",80), (1430302366,"a",443), (1430302366,"c",4100), (1430302366,"c",4200), (1430302366,"c",27017), (1430302366,"c",5000), (1430302366,"c",80)) 

when used zip 2 lists below :

val c = zip b

it returns results

list(((1430299869,a,4200),(1430302366,b,4100)), ((1430299869,a,0),(1430302366,b,4200)))

not lists of tuples, how can zip above data?

edit

expected results combine of 2 lists :

list((1430299869,"a",4200), (1430299869,"a",0),(1430302366,"b",4100), (1430302366,"b",4200), (1430302366,"b",5000), (1430302366,"b",27017), (1430302366,"b",80), (1430302366,"b",9300), (1430302366,"b",9200), (1430302366,"a",5000), (1430302366,"a",4200), (1430302366,"a",80), (1430302366,"a",443), (1430302366,"c",4100), (1430302366,"c",4200), (1430302366,"c",27017), (1430302366,"c",5000), (1430302366,"c",80))

second edit

i tried :

val d = for(((a,b,c),(d,e,f)) <- (a zip b)if(b.equals(e) && c.equals(f))) yield (d,e,f)

but gives empty results because of (a zip b) replaced a zip b a ++ b shows following error :

constructor cannot instantiated expected type;

so how can matching tuples?

according 2nd edit, need is:

for {    (a1,b1,c) <-    //rename extracted a1 , b1 avoid confusion   (d,e,f)  <- b   if b1.equals(e) && c.equals(f) } yield (d,e,f) 

or:

for {     (a1, b1, c) <-     (d, `b1`, `c`) <- b   //enclosing in backticks avoids capture , matches against defined values } yield (d, b1, c) 

zipping won't since need compare tuples in a tuples in b , seems.