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=={{header|11l}}==
<lang 11l>T City
String name
Float population
F (name, population)
.name = name
.population = population
V cities = [
City(‘Lagos’, 21),
City(‘Cairo’, 15.2),
City(‘Kinshasa-Brazzaville’, 11.3),
City(‘Greater Johannesburg’, 7.55),
City(‘Mogadishu’, 5.85),
City(‘Khartoum-Omdurman’, 4.98),
City(‘Dar Es Salaam’, 4.7),
City(‘Alexandria’, 4.58),
City(‘Abidjan’, 4.4),
City(‘Casablanca’, 3.98)
]
F first_index(cities, condition)
L(city) cities
I condition(city)
R L.index
F first(cities, condition)
L(city) cities
I condition(city)
R city
print(first_index(cities, city -> city.name == ‘Dar Es Salaam’))
print(first(cities, city -> city.population < 5.0).name)
print(first(cities, city -> city.name[0] == ‘A’).population)</lang>
{{out}}
<pre>
6
Khartoum-Omdurman
4.58
</pre>
=={{header|8th}}==
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