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  1. BEGIN { c=1 }
  2. $1 == "X" { if (c==1) { mmin=$2; mmax=$3 ;c++ }
  3.             if ($2<mmin) { mmin=$2 }
  4.             if ($3>mmax) { mmax=$3 }
  5.           } 
  6. END { print "X min: " mmin ", max: " mmax }
Success #stdin #stdout 0.01s 4276KB
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stdin
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X 1 2
X 3 4
Y 5 6
Y 7 8
stdout
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X min: 1, max: 4
https://ideone.com/dpvwL
language:
AWK (gawk 4.2.1)
created:
12 years ago
visibility:
public

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