Lynn «Кофеман»

const findUnique = (l) => l.reduce((a, b) => a ^ b);

#!/bin/bash

last_call=never

function f {
    local -n res=$1
    printf -v last_call '%(%x %X)T'
    res=$(($res * 2))
}

result=1

echo "Before: $last_call $result"
f result
echo "Return code: $?"
echo "After: $last_call $result"
sleep 1
f result
echo "Return code: $?"
echo "After: $last_call $result"

Before: never 1
Return code: 0
After: 06/16/2020 02:48:23 PM 2
Return code: 0
After: 06/16/2020 02:48:24 PM 4

location / {
    rewrite ^ /index.php break;
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/run/php/php7.2-fpm.sock;
}

return str.replace(/^(\d{4})(\d+)(\d{4})$/, (m, p1, p2, p3) => p1 + '*'.repeat(p2.length) + p3);

The third argument can be used to create virtual mocks – mocks of modules that don't exist anywhere in the system:

jest.mock(
  '../moduleName',
  () => {
    /*
     * Custom implementation of a module that doesn't exist in JS,
     * like a generated module or a native module in react-native.
     */
  },
  {virtual: true},
);

public static bool TestForSquares(IEnumerable<int> numbers, IEnumerable<int> squares) {
    var squaresEnumerator = squares.GetEnumerator();

    foreach(int number in numbers) {
        if(!squaresEnumerator.MoveNext()) {
            // в squares закончились элементы, а в numbers ещё нет
            return false;
        }

        if(number * number != squaresEnumerator.Current) {
            return false;
        }
    }

    if(squaresEnumerator.MoveNext()) {
        // в squares ещё остались элементы, а в numbers уже всё закончилось
        return false;
    }

    return true;
}

print_var_val() {
   echo "$1=${!1}"
}