Anchors and boundaries
·warm-up
The whole thing, not part of it
Match a three-digit code, a hyphen and four more digits — and only when that is the entire input. A sentence containing one is not one.
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Corpus
Steps0/ 156 · par 52| Input | Match | Steps |
|---|---|---|
| (empty) | 3 | |
| (empty) | 3 | |
| (empty) | 3 | |
| (empty) | 3 | |
| (empty) | 3 | |
| (empty) | 3 | |
| (empty) | 3 |
Trace
Select an input to step through what your pattern did to it.
Cmd-Enter submits too.