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Re: Grep Pattern

by Eily (Monsignor)
on Dec 12, 2018 at 14:39 UTC ( [id://1227148]=note: print w/replies, xml ) Need Help??


in reply to Grep Pattern

Having a TTFFTTFF... pattern is quite easy: 

  DB<11> $i = 0; say for grep { $i++ % 4 < 2 } 0..12
0
1
4
5
8
9
12

[download]
And starting at the fourth value in the pattern just means your start at the fourth value of $i: 
  DB<12> $i = 3; say for grep { $i++ % 4 < 2 } 0..12
1
2
5
6
9
10

[download]

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