New Release 80

General:. This page generally describes new functionality in the 80 series of revisions and uploads. This is Working Documentation that with maturity will be moved to the Master Documentation.

@>< Switch Arguments: Sometimes you could save an assignment into a variable if you were just able to switch the arguments when you applied a dyadic function. This operator, behaving like its @==, @=, @>, and @< cousins, tells a subsequent dyadic function to reverse its arguments before performing the operation. All this does is set a switch which dyadic operators watch for. The dyadic operator resets the switch so arguments are taken in their natural order after the operation.

boolean /| OR scan:

boolean /& AND scan:

numeric /<> : Fill missing numeric data: Scanning a numeric vector with /| fill in missing data with the last value seen. If data is missing at the beginning, the next value seen is substituted. If all are missing, it does nothing. Using the prefix operator @> causes the next value seen to be used for filling rather than using the last value seen. For values missing at the end, the last value seen is substituted. Using the prefix operator @== causes values to be linear interpolated between last and next values. Missing values at the begining get next seen; at the end, get last seen.

numeric /<> boolean   : Expand with boolean and Fill: First expands with boolean vector selecting sequentially where true and inserting #nil where false. Then applys monadic /| to the result.

numeric /<> numeric   : Replicate by count and then Fill: First expands by counts in right argument. For correspondence, the left and right arguments should be of the same length. For each element, the left argument position is replicated according to the "count" in the right argument. The left argument element is the first copied. Replicated elements are filled with #nil. The monadic /| is then applied to this result. By default (i.e. without @== or @> prefix), the result is simple replication by count. The result length is the sum reduction of the right argument.