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Programming-Idioms

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  • Java

Idiom #244 Print a map

Print the contents of the map m to the standard output: keys and values.

m.forEach((k, v) -> {
    out.println(k + " = " + v);
});
import java.util.Map;
System.out.println(m);

m is a Map<K,V>
import static java.lang.System.out;
m.entrySet().forEach(out::println);
#include <map>
#include <iostream>
for (auto entry : m) {
	std::cout << entry.first << ": " << entry.second << "\n";
}

Range-based for loop since C++11.
New implementation...
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programming-idioms.org 
m.forEach((k, v) -> {
    out.println(k + " = " + v);
});
System.out.println(m);
m.entrySet().forEach(out::println);
for (auto entry : m) {
	std::cout << entry.first << ": " << entry.second << "\n";
}
Console.WriteLine(string.Join(Environment.NewLine, m));
print(m);
IO.inspect m
fmt.Println(m)
fmt.Printf("%q", m)
console.table(m);
console.log(m);
for APair in m do writeln(APair.Key, APair.Value);
print "$_: $m{$_}\n" for keys %m;
print(m)
pprint.pp(m, width=1)
puts m
println!("{:?}", m);