Creating implementation for idiom 329 : Read value in a map

Idiom

# 329 Read value in a map

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Assign to v the value stored in the map m for the key k.

Explain what happens if there is no entry for k in m.

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Other implementations

v := m[k]

v, ok := m[k]

v = m.get(k);

v = m.get(k);

m.getOrDefault(k, null);

local v=m[k]

$v = $m{$k};

$v = $m{$k} // 'foobar';

v = m[k]

v = m.get(k, "default value")

v = m.get(k)

v = m[k]