Сергей Соколов

var a, b, c;
a = 1;   // a = 1, b = undefined, c = undefined
b = a++; // a = 2, b = 1, c = undefined
c = ++a; // a = 3, b = 1, c = 3
alert(b + c); // 1 + 3

SELECT `firstname`, `middlname`, `lastname`,`age`,`phone1`,`phone2`,`town` FROM profil WHERE `town` BETWEEN 4 AND 14 AND `age` BETWEEN 64 AND 99

function validate(conditions) {
  for (let index = 0; index < conditions.length; index++) {
    if (!conditions[index]()) {
      return false;
    }
  }

  return true;
}