Averages/Arithmetic mean: Difference between revisions

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We could use fold() to write a function that takes an array and calculates the mean.
 
<syntaxhighlight lang="langur">val .mean = ffn(.x) { fold(ffn{+}, .x) / len(.x) }
{{works with|langur|0.6.6}}
<syntaxhighlight lang="langur">val .mean = f(.x) fold(f{+}, .x) / len(.x)
 
writeln " custom: ", .mean([7, 3, 12])
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