f produces an atom numeric result on each cell (or pair of cells). It seems worthwhile to implement special code for f i. 1: (f i. 0: and f i: 1: etc.) so that it stops as soon as it finds the targeted value.
Special code already exists for (comp i. 1:) , http://www.jsoftware.com/help/release/compsc.htm done starting in J5.01, as the following example demonstrates: x=: 1e6 [EMAIL PROTECTED] 0 0.9 (< i. 1:) x 2 (0.9<x) i. 1 2 ts '0.9 (< i. 1:) x' 1.70413e_5 1152 ts '(0.9<x) i. 1' 0.0428736 1.04947e6 Even if the target is not found, i.e. if the entire argument has to be scanned, the special code still wins: 1 (< i. 1:) x 1000000 (1<x) i. 1 1000000 ts '1 (< i. 1:) x' 0.0146362 1088 ts '(1<x) i. 1' 0.0383577 1.04928e6 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
