A modern programming language that makes developers happier.

kotlinlang

Help me understand what is meant by "Case 2 doesn’t work with mutating properties, instead in case 1 the variable `it` is always not null."

The text in quotation was in response to:
What is actually the difference and what is the preferred to use:

Case 1:
`variable?.let { //... }`

Case 2:
`if (variable != null) { //... }`

if it's non-local or captured, another thread could be mutating the var

if it has custom getter or delegation then it could change at any time regardless

Thank you! Is there a code snippet so that I could practically run and see Kotlin throwing NPE when another thread interferes or delegation as you mentioned.

I mean, if `variable` is a field, you can imagine another thread calling `setVariable`

<https://pl.kotl.in/b3dqeIcph|https://pl.kotl.in/b3dqeIcph>

<https://pl.kotl.in/BzcH3j-Tn|https://pl.kotl.in/BzcH3j-Tn>

Thank you so much for great examples! This makes things very clear!