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2H. Gerunds
The phrases included here illustrate the following uses of gerunds:
- Insertion
- Case statement
- Recursion
- Power
| 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) |