Splitting strings in Erlang

string:split and lexemes turn ledger lines into data.

%% string:split and lexemes turn a ledger line into data.
main(_) ->
    Entry = "5560199,12,night",

    [Number, Mins, Shift] = string:split(Entry, ",", all),
    io:format("~s spoke ~s minutes on the ~s shift~n",
              [Number, Mins, Shift]),

    %% lexemes splits on any of several separators.
    Note = "patch 3;test 7 ring 9",
    Words = string:lexemes(Note, "; "),
    io:format("~p instructions~n", [length(Words)]),
    [io:format("- ~s~n", [W]) || W <- Words].

How it works

1. string:split(Entry, ",", all) breaks every comma.
2. The result destructures straight into three names.
3. lexemes splits on any of several separator characters.

Keywords and builtins used here

• format
• length
• lexemes
• main
• split

The run, in numbers

Lines

13

Characters to type

435

Tokens

118

Three-star pace

60 tpm

At the three-star pace of 60 tokens a minute, this run takes about 118 seconds.

Type this snippet

Step 3 of 4 in Text & numbers, step 21 of 31 in Language basics.

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