Does this have side-effects (i.e. on the message r...
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edik
01/27/2018, 1:08 AMDoes this have side-effects (i.e. on the message receiver) or does it simply return an incremented value?
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orangy
01/27/2018, 1:11 AM
Message reciever? You are just incrementing an integer value, what message do you expect to be sent?
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edik
01/27/2018, 1:15 AMprivet ilya
edik
01/27/2018, 1:15 AMdoes my question make sense?
edik
01/27/2018, 1:16 AMi++ would mutate the receiver
edik
01/27/2018, 1:16 AMi.inc() does not?
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orangy
01/27/2018, 1:18 AM
e
edik
01/27/2018, 1:21 AMYes I did read this before, many thanks
edik
01/27/2018, 1:22 AMI think my assumption is correct
edik
01/27/2018, 1:22 AMi++ will mutate the receiver
edik
01/27/2018, 1:23 AMa.inc() will not mutate the receiver
edik
01/27/2018, 1:23 AMi++ != i.inc()
edik
01/27/2018, 1:23 AM🙂
edik
01/27/2018, 1:24 AMso, what is the equivalent of i++ for nullable types?
edik
01/27/2018, 1:24 AMas we can't i?.++
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orangy
01/27/2018, 1:27 AM
what do you want it to mean?
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edik
01/27/2018, 1:29 AMI want the equivalent of i?.++ (if it were allowed)
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orangy
01/27/2018, 1:30 AM
Like
i = if (i == null) null else i.inc()e
edik
01/27/2018, 1:34 AMPerhaps I didn't explain well. I want to be able to express the same semantics as i++ for a potentially nullable i
edik
01/27/2018, 1:35 AMi++ does not require an assignment obviously, because it mutates i
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orangy
01/27/2018, 1:36 AM
It does
orangy
01/27/2018, 1:36 AM
The inc() and dec() functions must return a value, which will be assigned to the variable on which the ++ or -- operation was used.
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edik
01/27/2018, 1:37 AMval a : Int = 0
a.inc()
a.inc()
println(a)
edik
01/27/2018, 1:37 AMreturns 0
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orangy
01/27/2018, 1:37 AM
` ``` `
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edik
01/27/2018, 1:39 AMsorry, same even if var declaration
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orangy
01/27/2018, 1:40 AM
I’m not sure what you don’t understand.
i++i = i.inc()e
edik
01/27/2018, 1:42 AMsorry yes, you are correct I am looking for something like
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i = if (i == null) null else i.inc()edik
01/27/2018, 1:42 AMI just reread your code
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orangy
01/27/2018, 1:42 AM
I remember you promised to use proper formatting 😉
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edik
01/27/2018, 1:44 AMso we need to do the above for
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i++edik
01/27/2018, 1:45 AMthanks so much for your help and I apologize for my poor Russian... yah govoroo pa-russki nyet ochen horosho as you can guess
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orangy
01/27/2018, 1:45 AM
Copy code
operator fun Int?.inc() = this?.inc()
fun test() {
var i: Int? = null
i++
}e
edik
01/27/2018, 1:45 AMexactly!
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orangy
01/27/2018, 1:46 AM
Good, now I can go to bed 😄
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edik
01/27/2018, 1:47 AMthanks for all your help ilya much appreciated.. poka 🙂
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