11 2023 档案
摘要：In Kotlin, the type system distinguishes between references that can hold null (nullable references) and those that cannot (non-nullable references).
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摘要：A higher-order function is a function that takes functions as parameters, or returns a function. fun <T, R> Collection<T>.fold( initial: R, combine: (
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摘要：Function parameters can have default values, which are used when you skip the corresponding argument. This reduces the number of overloads: fun read(
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摘要：Properties in Kotlin classes can be declared either as mutable, using the var keyword, or as read-only, using the val keyword. // full syntax for decl
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摘要：A class in Kotlin has a primary constructor and possibly one or more secondary constructors. // primary constructor class Person(val name: String) { v
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