reformatting data frame with List in R - r

Question

Helo, I am trying to reshape a data.frame in R such that each row will repeat with a different value from a list, then the next row will repeat from a differing value from the second entry of the list.
the list is called, wrk, dfx is the dataframe I want to reshape, and listOut is what I want to end up with.
Thank you very much for your help.
> wrk
[[1]]
[1] "41" "42" "44" "45" "97" "99" "100" "101" "102"
[10] "103" "105" "123" "124" "126" "127" "130" "132" "135"
[19] "136" "137" "138" "139" "140" "141" "158" "159" "160"
[28] "161" "162" "163" "221" "223" "224" ""
[[2]]
[1] "41" "42" "44" "45" "98" "99" "100" "101" "102"
[10] "103" "105" "123" "124" "126" "127" "130" "132" "135"
[19] "136" "137" "138" "139" "140" "141" "158" "159" "160"
[28] "161" "162" "163" "221" "223" "224" ""
>dfx
projectScore highestRankingGroup
1 0.8852 1
2 0.8845 2
>listOut
projectScore highestRankingGroup wrk
1 0.8852 1 41
2 0.8852 1 42
3 0.8852 1 44
4 0.8852 1 45
5 0.8852 1 97
6 0.8852 1 99
7 0.8852 1 100
8 0.8852 1 101
...
35 0.8845 2 41
36 0.8845 2 42
37 0.8845 2 44
38 0.8845 2 45
39 0.8845 2 98
40 0.8845 2 99
41 0.8845 2 100

Answer 1

How about replicate rows of dfx and cbind with unlisted wrk:
listOut <- cbind(
dfx[rep(seq_along(wrk), sapply(wrk, length)), ],
wrk = unlist(wrk)
)

Answer 2

How about:
If wrk contains simple vectors like in your example:
> szs<-sapply(wrk, length)
> fulldfr<-do.call(c, wrk)
> listOut<-cbind(dfx[rep(seq_along(szs), szs),], fulldfr)
If wrk contains dataframes:
> szs<-sapply(wrk, function(dfr){dim(dfr)[1]})
> fulldfr<-do.call(rbind, wrk)
> listOut<-cbind(dfx[rep(seq_along(szs), szs),], fulldfr)

Answer 3

How about:
expand.grid(dfx$projectScore, dfx$highestRankingGroup, wrk[[1]])
Edit:
Maybe you can eleborate a bit more, because this does seem to work:
a <- c("41","42","44","45","97","99","100","101","102","103","105", "123","124","126","127","130","132","135","136","137","138","139","140","141","158","159","160","161","162","163","221","223","224")
wrk <-list(a, a)
dfx <- data.frame(projectScore=c(0.8852, 0.8845), highestRankingGroup=c(1,2))
listOut <- expand.grid(dfx$projectScore, dfx$highestRankingGroup, wrk[[1]])
names(listOut) <- c("projectScore", "highestRankingGroup", "wrk")
listOut[order(-listOut$projectScore,listOut$highestRankingGroup, listOut$wrk),]