Apply a callback to an array: Difference between revisions
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m (→{{header|REXX}}: added DO-END labels, added comments, added whitespace. -- ~~~~) |
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=={{header|REXX}}== |
=={{header|REXX}}== |
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<lang rexx>/*REXX program to apply a callback to |
<lang rexx>/*REXX program to apply a callback to a stemmed (REXX) array. */ |
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a.=; b.= |
a.=; b.= |
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a.0= 0 |
a.0= 0 |
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call bangit 'a','b' /*factorialize the A array, store results in B */ |
call bangit 'a','b' /*factorialize the A array, store results in B */ |
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call listab ' after' |
call listab ' after' |
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exit /*stick a fork in it, we're done.*/ |
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exit |
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/*──────────────────────────────────BANGIT subroutine───────────────────*/ |
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/*─────────────────────────────────────BANGIT subroutine────────────────*/ |
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bangit: do |
bangit: do i=0 |
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_=value(arg(1)'.' |
_=value(arg(1)'.'i); if _=='' then return |
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call value arg(2)'.' |
call value arg(2)'.'i,fact(_) |
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end |
end /*i*/ |
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/*──────────────────────────────────FACT subroutine─────────────────────*/ |
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/*─────────────────────────────────────FACT subroutine──────────────────*/ |
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fact: procedure; !=1; do j=2 to arg(1); !=!*j; end; return ! |
fact: procedure; !=1; do j=2 to arg(1); !=!*j; end; return ! |
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/*──────────────────────────────────LISTAB subroutine───────────────────*/ |
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/*─────────────────────────────────────LISTAB subroutine────────────────*/ |
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listab: do j=0 while a.j\=='' |
listab: do j=0 while a.j\==''; say arg(1) 'a.'j"="a.j; end /*j*/ |
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say arg(1) ' |
say; do k=0 while b.k\==''; say arg(1) 'b.'k"="b.k; end /*k*/ |
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end |
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say |
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do j=0 while b.j\=='' |
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say arg(1) 'b.'j"="b.j |
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end |
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return</lang> |
return</lang> |
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'''output''' |
'''output''' |
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