How do I pattern match in multi-level nested maps Suppose this is my map , mymap = %{a: "xxx" , b: %{k1: "k1" , k2: "k2" , c: %{k3: "k3", k4: "k4"}}} When I do this , I get an error , ** %{a: v1, b: %{k1: v2, k2: v3, c: %{k3: v4, k4: v4}}} = mymap ** ** (MatchError) no match of right hand sid…

[image] tushar: %{k3: v4, k4: v4} You ask here that :k3 and :k4 have values that meatch.

Extremely sorry for the typo , if I extend to below mymap = %{a: "xxx" , b: %{k1: "k1" , k2: "k2" , c: %{k3: "k3", k4: "k4"}, d: %{k5: "k5", k6: "k6"}}} Here "b" has multiple sub maps within it , the below pattern match fails , %{a: v1, b: %{k1: v2, k2: v3, c: %{k3: v4, k4: v4}, d: %{k5: v5, k6: …

you still didn’t fix the typo. You ask that k3: and k4: both have the same value v4 but then pass "k3" and "k4 as the values. Your pattern is OK, your data simply doesn’t match.

[image] tushar: c: %{k3: v4, k4: v4}, Again, like Noobz wrote you need k3 and k4 values to be the same here. You need another variable vX to match k4 values if it has to be distinct from k3’s

Apologies , it was indeed the typo causing the issue :weary:

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Pattern matching in multi level nested maps

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tushar July 2, 2020, 1:23pm 6

Apologies , it was indeed the typo causing the issue