Created
May 25, 2019 06:44
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[Kotlin] Unwrap null objects or return immediately
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| fun <T1, T2> safe(t1: T1?, t2: T2?): Pair<T1, T2>? { | |
| return if (t1 == null || t2 == null) null else Pair(t1, t2) | |
| } | |
| fun <T1, T2, T3> safe(t1: T1?, t2: T2?, t3: T3): Triple<T1, T2, T3>? { | |
| return if (t1 == null || t2 == null || t3 == null) null else Triple(t1, t2, t3) | |
| } | |
| // Usage (case in fragments) | |
| val (context, activity) = safe(context, activity) ?: return | |
| val (context, activity, view) = safe(context, activity, view) ?: return |
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