guard let reachability = Reachability(), reachability.isReachable == true else {
    // No network connection available. Do stuff.
    ...
}

in_array($this->market, ["ru"])

public static bool HasValues<T>(this ICollection<T> collection)
{
    if (collection == null)
    {
        return false;
    }
    if (collection.Count == 0)
    {
        return false;
    }
    return true;
}

from itertools import combinations as comb
from functools import reduce
  
def all_arrangements(k):
	m=k*(k+1)/2
	m_bits_on=set([tuple(reduce(lambda x,y:x[:y]+[1]+x[y+1:],c,[0]*(2*m+1))) for c in comb(range(2*m+1),m)])
	return set([tuple(sorted(filter(lambda i:i>0,reduce(lambda x,y: x+[y] if y==0 else x[:-1]+[x[-1]+1,],p,[0])))) for p in m_bits_on])

const ITEM_COUNT = 100
let visibleItems = []
for (let i = 0; i < ITEM_COUNT; ++i) {
  visibleItems.push(false)
}

function showItem(index) {
  visibleItems = []
  for (let i = 0; i < ITEM_COUNT; ++i) {
    visibleItems.push(false)
  }
  visibleItems[index] = true
}

if (i === 1 || i === 2 || i === 3 || i === 4 || i === 5 || i === 6 || i === 7 || i === 8 || i === 9 || i === 10){
 return true;
}

private static int alphabetToNumber(String letter) {
    String s = letter.toLowerCase();
    if (s.equals("a")) {
        return 1;
    } else if (s.equals("b")) {
        return 2;
    } else if (s.equals("c")) {
        return 3;
    } else if (s.equals("d")) {
        return 4;
    } else if (s.equals("e")) {
        return 5;
    } else if (s.equals("f")) {
        return 6;
    } else if (s.equals("g")) {
        return 7;
    } else if (s.equals("h")) {
        return 8;
    } else if (s.equals("i")) {
        return 9;
    } else if (s.equals("j")) {
        return 10;
    } else if (s.equals("k")) {
        return 11;
    } else if (s.equals("l")) {
        return 12;
    } else if (s.equals("m")) {
        return 13;
    } else if (s.equals("n")) {
        return 14;
    } else if (s.equals("o")) {
        return 15;
    } else if (s.equals("p")) {
        return 16;
    } else if (s.equals("q")) {
        return 17;
    } else if (s.equals("r")) {
        return 18;
    } else if (s.equals("s")) {
        return 19;
    } else if (s.equals("t")) {
        return 20;
    } else if (s.equals("u")) {
        return 21;
    } else if (s.equals("v")) {
        return 22;
    } else if (s.equals("w")) {
        return 23;
    } else if (s.equals("x")) {
        return 24;
    } else if (s.equals("y")) {
        return 25;
    } else if (s.equals("z")) {
        return 26;
    } else {
        return 0;
    }
}

<Window WindowStyle="None" MouseLeftButtonDown="WindowMouseLeftButtonDown"/>
    <x:Code>
        <![CDATA[            
            private void WindowMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
            {
                DragMove();
            }
        ]]>
    </x:Code>
</Window>

checkParameter(elem: boolean): any {
	if(elem) return true;
	return null;
}

function getJSType(cppType: string) {
    let typeMap = new Map<string, string>([
        ["Bool", "boolean"],
        ["Int32", "number"],
        ["UInt32", "number"],
        ["Int64", "number"],
        ["UInt64", "number"],
        ["Double", "number"],
        ["String", "string"],
        ["Object", "any"]
    ]);

    if (typeMap.get(cppType) === undefined) {
        console.error("Invalid type in getJavascriptType: " + cppType);
        process.exit(1);
    }
    return typeMap.get(cppType);
}

const errorHandler = () => {
  throw new Error();
};

.black {
    color: #000;
}

.not-black {
    color: #999;
}

function formatUpToANumberOfZeroesAfterFloatingPoint(number, numberOfZeroes, floatingPointSymbol) {
    numberOfZeroes = (numberOfZeroes === undefined || numberOfZeroes < 0) ? 2 : numberOfZeroes;
    floatingPointSymbol = floatingPointSymbol === undefined ? '.' : floatingPointSymbol;
    let numberSplitByFloatingPoint = number.toString().split(floatingPointSymbol);
    if (numberSplitByFloatingPoint.length !== 2) 
        return `${number}${floatingPointSymbol}${'0'.repeat(+numberOfZeroes)}`;
    
    let numberAfterFloatingPoint = numberSplitByFloatingPoint[1].toString();
    let formattedNumber = `${numberSplitByFloatingPoint[0]}`;
    let numberAfterFloatingPointLength = numberAfterFloatingPoint.toString().length;
    if (+numberOfZeroes > +numberAfterFloatingPointLength) 
        return `${formattedNumber}${floatingPointSymbol}${numberAfterFloatingPoint}${'0'.repeat(+numberOfZeroes - numberAfterFloatingPointLength)}`;
    
    let countOfNumbersAfterFloatingPoint = numberAfterFloatingPointLength;
    for (var i = numberAfterFloatingPointLength - 1; i >= 0; i--) {
        if (+(numberAfterFloatingPoint[i]) !== 0 || +countOfNumbersAfterFloatingPoint === +numberOfZeroes) {
            formattedNumber += `${floatingPointSymbol}${numberAfterFloatingPoint.substring(0, countOfNumbersAfterFloatingPoint)}`;
            break;
        }
        
        countOfNumbersAfterFloatingPoint--;
    }

    return formattedNumber;
}

def get_verified_infos(request):
    try:
        # request logic here
        return data
    except Exception:
        logger.error(
            'Request to XXX was unsuccessful, '
            'Will retry till max recursion! Retrying...'
        )
        return get_verified_infos(request)

A,B=map(str,input().split())        # let's begin by casting strings to strings!

while(int(A)!=0 and int(B)!=0):

    tamanhoa=0
    tamanhob=0

    for i in range(len(A)):
        tamanhoa+=1                 # wonderful way to determine the length of
                                    # a string!
    for i in range(len(B)):
        tamanhob+=1

    vA = [0]*tamanhoa
    vB = [0]*tamanhob

    if tamanhoa>tamanhob:
        vA = [0]*tamanhoa           # Just to make sure it really gets set!!!
        vB = [0]*tamanhoa

        for i in range(tamanhoa-1,-1,-1):
            vA[i]=int(A[i])         # he even saved an operation by casting
                                    # the char to int at the same time!
        for i in range(tamanhob):
            vB[i+1]=int(B[i])
    elif tamanhoa<tamanhob:
        vA = [0]*tamanhob           # Just to make sure it really gets set!!!
        vB = [0]*tamanhob

        for i in range(tamanhoa):
            vA[i+1]=int(A[i])

        for i in range(tamanhob-1,-1,-1):
            vB[i]=int(B[i])

        tamanhoa=tamanhob

    else:
        for i in range(tamanhoa):
            vA[i]=int(A[i])

        for i in range(tamanhob):
            vB[i]=int(B[i])

    print(vA)
    print(vB)
    
    carry = 0

    for i in range(tamanhoa-1,-1,-1):
        soma = vA[i] + vB[i]
        if soma > 9:
            carry += 1
            if vA[i-1]!= 9:
                vA[i-1] += 1
            else:
                vB[i-1] +=1


    if carry == 0:
        print('No carry operation.')
    elif carry == 1:
        print(carry, 'carry operation.')
    else:
        print(carry, 'carry operations.')

    A,B=map(str,input().split())    # why bother casting strings to int? yay

    if int(A)==0 and int(B)==0:
        break