⍸⍣¯1 kwds

table.tsv

@@ -1212,7 +1212,7 @@ Xs(1↓¨,⊂⍨1,=)Yv	Split Yv (which has to be simple) at occurrences of Xs (r
 X(⍳|⍨1+∘≢⊣)Y	First indices in X of major cells Y, 0 if not found	Tacit	Dyadic Function		Index Generation	indexin indexof find locate positionof 1st zero locating items elements location missing unfound		
 (⌽⌽,0,-)∘⍳Js	Integers from -Js to Js	Tacit	Monadic Function		Mathematical	whole numbers natural symmetric negative positive		
 (⍳∘≢,/¨⊂)Yv	All possible subvectors grouped by length (Yv must be simple)	Tacit	Monadic Function		Selection	sub-strings substrings sub-vectors sub-sequences subsequences segmented sub-lists partitioned sublists separated separator delimiter		
-(⊢∊⍨∘⍳⌈/)Jv	Conversion of set of indices Jv to a mask	Tacit	Monadic Function		Boolean/Logical	indicate masking indicating bitmask bit-mask converting change changing inverse of ⍸⍣¯1		
+(⊢∊⍨∘⍳∘⊃⌈/)Jv	Conversion of set of indices Jv to a mask	Tacit	Monadic Function		Boolean/Logical	indicate masking indicating bitmask bit-mask converting change changing inverse of where reverse ⍸⍣¯1		
 X(⍸-⍳≤∘≢⊣)Y	Indices of major cells of Y in right-inclusive intervals with cut-offs X	Tacit	Dyadic Function		Index Generation	left-exclusive intervalindex iotaunderbar bins groups ranges buckets classes classifying classification items elements high-rank (a,b] ]a,b] ⍺<x≤b	https://tio.run/##SyzI0U2pTMzJT///Pzex5FHbBGMFo0e9Wx71bjbjetQ3FSigABRX0HjUu0MXKPioc8mjjhmPOhc96lqsqWCsYEyMIpP//wE	
 (+/∘∪⊢∨⍳)Js	Sum of positive divisors of Js	Tacit	Monadic Function		Mathematical	sigma σ(n)	https://tio.run/##ASsA1P9hcGwtZHlhbG9n///ijpXihpAgKCsv4oiY4oiq4oqi4oio4o2zKSAxMv//	
 (⊃∘⍋∘|⊃⊢)Nv	First number with smallest magnitude	Tacit	Monadic Function		Mathematical	minimum absolute value closest nearest to 0 zero	https://tio.run/##SyzI0U2pTMzJT////1Hf1EdtExQ0HnU1P@qY8ai3G0jWgDhdizQVjBUOrTdRMPr/HwA