## return an boolean indicating whether the passed object is an integer.
##
## Author: Matthew D. Furia <matt.furia@sagebase.org>
###############################################################################
checkInteger <- function(x){
result <- NULL
if(length(x) == 0L)
return(FALSE)
for(i in 1:length(x)){
if(length(x) > 1){
xx <- x[[i]]
}else{
xx <- x
}
if(any(isS4(xx)) | length(xx) == 0L | is.list(xx)){
result <- c(result, FALSE)
}else{
suppressWarnings(thisVal <- tryCatch({
xx <- gsub("L$","",xx)
.Machine$double.eps > abs(as.integer(xx) - as.numeric(xx))
},
error = function(e) { rep(FALSE, length(xx)) }
)
)
mk <- is.na(thisVal) | is.null(thisVal)
if(any(mk))
thisVal[mk] <- FALSE
result <- c(result, thisVal)
}
}
result
}
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