MapIndexed

Tilgjengelig

Applies a function to each element and its index.

Former

MapIndexed[f, expr]

MapIndexed[f, expr, levelspec]

MapIndexed[f]

Verifiserte eksemplerMapIndexed[f, {a, b, c}] → {f[a, {1}], f[b, {2}], f[c, {3}]}MapIndexed[f, <|"x" -> 10, "y" -> 20|>] → <|x -> f[10, {Key[x]}], y -> f[20, {Key[y]}]|>MapIndexed[f, {{1, 2}, {3, {4, 5}}}, -2] → {f[{1, 2}, {1}], f[{3, f[{4, 5}, {2, 2}]}, {2}]}MapIndexed[f, {{1, 2}, {3, {4, 5}}}, {-1}] → {{f[1, {1, 1}], f[2, {1, 2}]}, {f[3, {2, 1}], {f[4, {2, 2, 1}], f[5, {2, 2, 2}]}}}MapIndexed[f, {{1, 2}, {3, {4, 5}}}, Infinity] == MapIndexed[f, {{1, 2}, {3, {4, 5}}}, -1] → True

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Brukt i

Legend specific values - 4 steg

Emner

Applying Functions To Lists - Multi-Element Mapping
Functional Programming - Applying Functions to Lists »
List Manipulation - Applying Functions to Lists »
Looping Constructs - Iterating over Lists & Expressions »

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