What is the difference between use{} and apply{} in kotlin?

Question

cursor?.apply{
    this.moveToFirst() 
}

cursor?.use{
    it.moveToFirst() 
}

The only difference I see is between it and this, that is the same instance. But, is there any other difference?

Ben P. · Accepted Answer · 2021-03-02 21:37:37Z

3

use() can only be called with a Closeable receiver. After the block is executed, the Closeable resource is closed, which saves boilerplate.

You can see https://kotlinlang.org/docs/scope-functions.html for more information on all the scope functions. use() is essentially the same as let(), except with the addtional auto-closing feature.

answered Mar 2, 2021 at 21:37

Ben P.

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1 Comment

flaxel Over a year ago

Maybe you can add that apply returns the context object and you can add the doc links for apply and use.

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