WeChall->Challenges->Challenge: Training: Regex

Level 3 Vai alla sfida "Training: Regex"

Level 3Why I can match the wechall3?

Osei

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Level 3
07 Mag 2017 - 14:39:10 (9a 178gg) Google/traduci0Grazie!0Bel post!2Brutto post! Link

my regex:

/^wechall4?(?=\.(jpg|png|bmp|gif|tiff))$/

so I tried this and apparently, it would not match "wechall.jpg"
But I can't see my mistake after browsing through this forum.
Can u please help me?

greets

dloser

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RE: Level 3
07 Mag 2017 - 14:55:19 (9a 178gg) Google/traduci1Grazie!1Bel post!1Brutto post! Link

The construct you use is checked, but isn't included in the actual match. So the "pointer" (if you will), is still at '.' after it. The next check is to see if it is at the end of the string, which will fail.

Read the documentation very carefully. ;)

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