2H. Gerunds

The phrases included here illustrate the following uses of gerunds:

m0=: horner=: +`*/	`m0 a,x,b,x,c` is `(a,b,c)p.x`
m1=: grid=: +`(*i.)/	`grid b,s,n` From `b` in `n s-`steps
m2=: case1=: _1:`%:`:@."0	Sqr, _1, or sq root if neg, zero, or pos
d3=: sort=: /:~@]`(\:~@])@.[	Sort up or down for left 0 or 1
`v4=: cases=: case1 : sort`	Ambivalent function
`a5=: sel=: 1 : '] #~ ] x {.'`	Selection for Quicksort
m6=: qs=: ] ` ($:@(<sel), =sel, $:@(>sel)) @. (1:<#)	Quicksort defined recursively
m7=: (0&,+,&0)^:([`1:)	Binomial coefficients (gerundial power)

JPhrases/Gerunds