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mapkey​

mapkey(
    @llll ? ## llll (required)
    @key ? ## symbol (required)
    @func ? ## lambda function (required)
) -> llll

Modifies an existing llll key via a lambda function.

Arguments​

  • @llll ? [llll]: llll to modify. (required)
  • @key ? [symbol]: name of llll key. (required)
  • @func ? [lambda function]: lambda function with signature $x, $llll -> $y. (required)

Output​

modified llll [llll]