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2 extremely useful PostScript operators

uniblab | PRO | 01/02/20 12:51:53 AM UTC | 0 ⭐ | 14635 👁️ | Never ⏰ | []
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% dict key tryget -> (any true)|false
/tryget { 2 copy known {
  get true
} {
  pop pop false
} ifelse } bind def
 
% dict key trygetnot -> (any false)|true
/trygetnot { 2 copy known {
  get false
} {
  pop pop true
} ifelse } bind def

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    01/01/70 12:00:00 AM UTC
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