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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
parent bba7bfd280
commit ba8067c3b7
14570 changed files with 153136 additions and 63871 deletions
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15
Task/Function-composition/PostScript/function-composition.ps
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@ -1,7 +1,12 @@
/compose { % f g -> { g f }
[ 3 1 roll exch
% procedures are not executed when encountered directly
% insert an 'exec' after procedures, but not after operators
1 index type /operatortype ne { /exec cvx exch } if
dup type /operatortype ne { /exec cvx } if
] cvx
} def
/square { dup mul } def
/plus1 { 1 add } def
/sqPlus1{ square plus1 } def
% if the task really demands we make a function called "compose", well
/compose { def } def % so now we can say:
/sqPlus1 { square plus1 } compose
/sqPlus1 /square load /plus1 load compose def