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| Subject | English | Russian |
| progr. | null-coalescing | объединение с неопределённым значением (The? operator is called the null-coalescing operator. It returns the left-hand operand if the operand is not null; otherwise it returns the right hand operand. Alex_Odeychuk) |
| progr. | null-coalescing operator | оператор объединения с неопределённым значением (The ?? operator is called the null-coalescing operator. It returns the left-hand operand if the operand is not null; otherwise it returns the right hand operand. Alex_Odeychuk) |