Worked examples

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Worked example

The fold returns an attribute set. Ask for its names without demanding the value of total.

Definitions · example.nix

n = 100000;
ticks = builtins.genList (i: i) n;
result = builtins.foldl'
  (acc: _: { total = acc.total + 1; })
  { total = 0; } ticks;

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Result

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