Github user felixcheung commented on a diff in the pull request: https://github.com/apache/spark/pull/9023#discussion_r41692768 --- Diff: R/pkg/R/DataFrame.R --- @@ -1795,17 +1795,15 @@ setMethod("fillna", if (length(colNames) == 0 || !all(colNames != "")) { stop("value should be an a named list with each name being a column name.") } - - # Convert to the named list to an environment to be passed to JVM - valueMap <- new.env() - for (col in colNames) { - # Check each item in the named list is of valid type - v <- value[[col]] + # Check each item in the named list is of valid type + lapply(value, function(v) { --- End diff -- nit: this is going through it twice.. perhaps add a FUN param to `convertNamedListToEnv` to allow for a custom validation for each value?
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