Scala Function Call-by-Name | Tutorial
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Scala Function Call-by-Name
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Scala Functions
Scala's interpreter has two ways when parsing function arguments:
- Call-by-value: calculates the value of the parameter expression first, and then applies it inside the function;
- Call-by-name: applies the unevaluated parameter expression directly inside the function
Before entering the function, the call-by-value method has already finished calculating the value of the parameter expression, while call-by-name calculates the value of the parameter expression inside the function.
This causes a phenomenon: every time call-by-name is used, the interpreter will calculate the value of the expression once.
object Test {
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