Returns the offset between two series positions.
offset? series1 series2
series1 - The series1 argument. (must be: series)
series2 - The series2 argument. (must be: series)
Return the difference of the indexes for two positions within a series.
str: "abcd" p1: next str print offset? str p1 1
str: "abcd" p1: next str p2: find str "d" print offset? p1 p2 2
head - Returns the series at its head.
head? - Returns TRUE if a series is at its head.
index? - Returns the index number of the current position in the series.
length? - Returns the length of the series from the current position.
pick - Returns the value at the specified position in a series.
skip - Returns the series forward or backward from the current position.
tail - Returns the series at the position after the last value.
tail? - Returns TRUE if a series is at its tail.