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erlangerl

How do I remove a character from a list or string in Erlang?

How do I remove the character / from this list (or call it a string)

List = "/hi"
Solution

  • Because Erlang variables are immutable and

    List = "/hi".

    binds List to the expression "\hi", you cannot simply remove anything from List; in fact, you cannot alter List in any way as long as it remains bound.

    What you can do instead is bind another variable, called T below, to the tail of List, like so:

    1> List = "/hi".
"/hi"
2> T=tl(List).
"/hi"
3> T.
"hi"