The identical-to operator ( === ) returns false when comparing two references to different object instances, even if the two instances have the same value.
What does += mean in Swift?
The expression a += 2 is shorthand for a = a + 2 . Effectively, the addition and the assignment are combined into one operator that performs both tasks at the same time . Note. The compound assignment operators don’t return a value. For example, you can’t write let b = a += 2 .
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What does ~= mean in Swift?
Discussion. The pattern-matching operator ( ~= ) is used internally in case statements for pattern matching. When you match against an Equatable value in a case statement, this operator is called behind the scenes.
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What does == mean in Swift?
The == or equality operator checks whether the two operands are equal . What equal means for an object depends on the implementation of the class or structure. For the NSArray class, the contents of the arrays are compared. In the above example, arr1 is equal to arr2 because the values stored in the arrays are equal.
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What does || mean in Swift?
|| Called Logical OR Operator . If any of the two operands is non-zero, then the condition becomes true.