Is it common to want to write an assert statement in a regular method (not a test?) example: I want to make sure the arg that people pass in is greater than 0

Usually, people use the

require

function (for parameters) or the

ensure

function (for the state of a class). Or you could have a

value class PositiveInt internal constructor(val underlying: Int)

that has a

require

statement in its initializer and a nullable factory function

fun PositiveInt(int: Int): PositiveInt?

often do

require

or

check

to handle verification conditions.

It's sometimes useful to do. It's related to concepts of defensive programming & fail-fast

it’s technically ‘offensive programming’, a subset of defensive programming. defensive would be compensating for the invalid inputs (if string == null string = “”) vs failing fast on invalid inputs.

Ah. require was what i was looking for. Throws IAE. chefs kiss

yep,

require

is for validating inputs,

check

is for validating state, and

error

can be used for anything else.