Nothing
metaMerge <- function(x,...)UseMethod('metaMerge')
metaMerge.list <- function(x,all=TRUE,...){
if(length(x)==0)return(x)
if(length(x)==1)return(x[[1]])
metaMerge(x=metaMerge(x[-length(x)]),y=x[[length(x)]],all=all,...)
}
metaMerge.character <- function(x,import=read.table,all=TRUE,...){
miss <- x[!file.exists(x)]
if(length(miss))stop('cannot find, e.g.,',miss[[1]])
import <- match.fun(import)
x <- lapply(x,import,...)
metaMerge(x,all=all,...)
}
metaMerge.default <- function(x,y,all=TRUE,...)merge(x,y,all=all,...)
metaMerge.data.frame <- function(x,y,all=TRUE,...){
if(is.null(y))warning('merging data.frame with NULL object')
merge(x,y,all=all,...)
}
metaMerge.NULL <- function(x,y,all=TRUE,...){
warning('merging NULL object')
merge(x,y,all=all,...)
}
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