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# ListTidy

Removes leading, trailing and repeated separators from a list.

| Expression      | Databox value                         | Result                             |
| --------------- | ------------------------------------- | ---------------------------------- |
| `ListTidy(";")` | `;B;;D;`                              | `B;D`                              |
| `ListTidy(",")` | `,Actinolite,Amosite,Anthophyllite,,` | `Actinolite,Amosite,Anthophyllite` |

Useful after building a list conditionally, where some of the parts turned out to be empty and left their separators behind.