• Clojure

(assoc m k v)

• C++

m[k] = v;

• C#

m[k] = v;

• D

m[k] = v;

• Dart

m[k] = v;

• Go

m[k] = v

• Groovy

m.k = v

• Groovy

m[k] = v

• Haskell

newM = Map.insert k v m

• JS

m[k] = v;

• JS

m.set(k, v);

• Java

m.put(k, v);

• PHP

$m[$k] = $v;

• Pascal

m.KeyData[k] := v;

• Perl

$m{$k} = $v;

• Python

m[k] = v

• Python

m.update({k: v})

• Ruby

m[k] = v

• Rust

m.insert(k, v);

• Smalltalk

m at: k put: v.