Android Specific Find Object By Matching Properties In A Collection On Predicate

I have a collection of 10,000 objects that have two properties: a string and a string[] class Product { String name; String[] aliases; } Each object is roughly 64 bytes, so we

Solution 1:

Canonical Kotlin, which would work on any version of Android regardless of Java Streams since it doesn't use them would be:

dataclassProduct(val name: String, val aliases: Array<String>)

// written as an extension function, but doesn't have to be...fun List<Product>.isProductOrAlias(text: String): String {
   returnthis.firstOrNull { product -> 
       product.name.equals(text, ignoreCase = true) ||
       product.aliases.any { alias -> 
           alias.equals(text, ignoreCase = true)
       }
   }?.name ?: ""
}

funtest() {
   // assume somewhere this was createdval products = listOf<Product>(...)

   println(products.isProductOrAlias("something")) // prints name of Product or ""
}

See Kotlin API reference for the standard library:

• collection extension function firstOrNull()

• array extension function any()

• string extension function equals()

• Kotlin Elvis operator ?:

• Kotlin Safecalls ?.