Discuss the differences between val and def “functions” Demonstrate the differences between val and def “functions” Background. For the most part — maybe 98% of the time — the differences between defining a “function” in Scala using def or val aren’t important. As I can personally attest, you can write Scala code for several For example, an integer can not be assigned to a long variable. This does not compile: val x: Int = 20 val y: Long = x. You need to do an explicit casting: val x: Int = 20 val y: Long = x.toLong() Conclusion. These are some of the most outstanding differences you can find between variables in Java and Kotlin. In this article, we are going to discuss the differences between html (), text (), and val () methods and their usage. 1. jQuery html () method: The html () method is used to set or return the inner HTML of a selected element. It works similarly to innerHTML in normal JavaScript to set or get the content of the selected element. In Kotlin, val and var are keywords used to declare variables, and they have different meanings based on mutability. Variables declared with val are read-only or immutable. Once a value is Essentially a Val is immutable meaning cannot be reassigned to anything else and is final. Var is mutable and can be reassigned to another value. General rule of thumb, make everything a val initially and only make a var if you need to change the value. Also if you're doing multi threaded programming, immutability makes your life easier from To read more, check data-classes. About the result, Technically, you are getting is different because of implementation of toString () method. data class' toString () method uses data class properties and values to form returning string. General class' toString () method uses hash code to form returning string. Share. The key difference between var and val in Kotlin is whether the variables they declare are mutable or immutable. Mutable vs Immutable variables Variables declared with var are mutable, meaning their values can be modified after assignment. The difference between val and var: Properties declared with val can't be updated over time; its just like constants in java. Properties declared with var can be changed overtime. It totally depends on your requirement. If you need to change properties over time then go for var; val otherwise. You can mix both in a object without any issue. why does .val () exist if .value does the same thing. This is because when you use jQuery to select an element $ ('#myinput'), you are returned an array of HtmlElements, not a single element. In this case the code would have to index an element to get value using the property ('#myinput') [0].value = ('#myinput').val (). 3vt5o.

difference between var and val