• Dart

Map myMap = {};
myMap.remove(key)

• Clojure

(dissoc m k)

• C++

m.erase(k);

• C#

map.Remove(key);

• D

m.remove(k);

• Elixir

m = Map.delete(m, k)

• Go

delete(m, k)

• Haskell

delete k m

• JS

m.delete(k)

• Java

map.remove(k);

• Lua

m[k]=nil

• PHP

unset($m[k]);

• Pascal

m.delete(k);

• Perl

delete $m{$k}; # also succeeds when $k does not exist in %m

• Python

m.pop(k, None)

• Ruby

m.delete(k)

• Rust

m.remove(&k);

• Scala

m -= k

• Scala

m - k