The _ is a placeholder for the parameter name . In your example, you call them differently, in the second function, you need to write the parameter name a: 1 . Swift’s function name convention is funcName(param1:param2:) , and it needs the _ as a placeholder to create the name of the function.
Read moreWhat is use of & operator in Swift?
4. Swift Logical Operators OperatorExampleMeaning&&a && bLogical AND: true only if both the operands are true||a || bLogical OR: true if at least one of the operands is true!!aLogical NOT: true if the operand is false and vice-versa.Swift Operators (With Examples) – Programiz www.programiz.com › swift-programming › operators
Read moreIs not operator in Swift?
Swift NOT Operator ! is used to perform logical NOT operation on a boolean operand . ! symbol is used for Logical NOT Operator in Swift. NOT Operator takes one boolean value as operands on its right and returns the logical NOT of the operand.
Read moreWhat 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.
Read moreWhat is the symbol in Swift?
Put simply, @UIApplicationMain is an indicator for Swift applications that indicates which object is your application’s main application delegate file. In Objective-C application templates, you would have a trivial main. m C file which sets the application delegate.
Read moreWhat 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.
Read moreWhat does || mean in Swift?
|| Called Logical OR Operator . If any of the two operands is non-zero, then the condition becomes true.
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