Creating implementation for idiom 251 : Parse binary digits

Idiom

# 251 Parse binary digits

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Extract integer value i from its binary string representation s (in radix 2)
E.g. "1101" -> 13

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(def i (read-string (str "2r" s)))

#include <string>

int i = std::stoi(s, nullptr, 2);

var i = int.parse(s, radix: 2);

erlang:list_to_integer(S,2).

character (len=:), allocatable :: s
integer :: i  
s = '1101'
read (s,'(B4)') i

import "strconv"

i, err := strconv.ParseInt(s, 2, 0)

const i = parseInt(s, 2)

Integer i = Integer.valueOf(s, 2);

import java.math.BigInteger;

int i = new BigInteger(s, 2).intValue();

$i = bindec($s);

uses SysUtils;

i := StrToInt('%'+s);

$i = oct('0b' . $s);

i = int(s, 2)

i = s.to_i(2)

let i = i32::from_str_radix(s, 2).expect("Not a binary number!");