Creating implementation for idiom 170 : Get map size

Idiom

# 170 Get map size

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Set n to the number of elements stored in mymap.

This is not always equal to the map capacity.

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(def n (count mymap))

auto n = mymap.size();

n = mymap.Count;

const n = mymap.length;

var n = mymap.length;

n := len(mymap)

def n = mymap.size()

import qualified Data.Map as Map

getMapSize :: Map.Map k v -> Int
getMapSize m = Map.size m

const n = mymap.size

int n = mymap.size();

local n=0
for _ in pairs(mymap) do n=n+1 end

$n = count($mymap);

uses fgl;

n := MyMap.Count;

my $n = keys %mymap;

n = len(mymap)

n = mymap.size

let n = mymap.len();

val n = mymap.size

n := mymap size.