Nested forEach, How to distinguish between inner and outer loop parameters?
it is just a default param name inside of all single argument closures. You could specify param name by yourself: collection.forEach { customName -> … }
it is just a default param name inside of all single argument closures. You could specify param name by yourself: collection.forEach { customName -> … }
Explanation This error is often caused by passing a list to for_each, but for_each only works with unordered data-types, i.e. with sets and maps. Solution The resolution depends on the situation. List of strings If the list is just a list of strings, the easiest fix is to add a toset()-call to transform the list … Read more
For other Kotlin newbees like me who are coming here just wanting to know how to loop through a collection, I found this in the documentation: val names = listOf(“Anne”, “Peter”, “Jeff”) for (name in names) { println(name) }
Scrolling to the bottom on change I don’t have enough reputation to post a comment yet, so here you go @Dam and @Evert To scroll to the bottom whenever the number of entries in your ForEach changes you can also use the same method with a ScrollViewReader, as mentioned in the answer above, by adding … Read more
The difference lies in that if the collection over which you are iterating is an object which has a length property, then the _.forEach() will iterate over it as if it were an array, whereas the _.forOwn() will iterate over it like an object. Assume you have the object: a = { x: 100, y: … Read more
Different. foreach iterates over a list and performs some operation with side effects to each list member (such as saving each one to the database for example) map iterates over a list, transforms each member of that list, and returns another list of the same size with the transformed members (such as converting a list … Read more