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WeChall->Challenges->Challenge: Training: Regex

Level 3 Go to the Training: Regex challenge

Level 3Why I can match the wechall3?

__Unknown Country

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Level 3
Мај 07, 2017 - 14:39:10 (8y 19d) Google/translate0Thank You!0Good Post!2Bad 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

__Unknown Country

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RE: Level 3
Мај 07, 2017 - 14:55:19 (8y 19d) Google/translate1Thank You!1Good Post!1Bad 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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