var email=null;
email?: println("email is empty");
email?.let{
println("emali not empty");
}
var current= email?.let { "nihao" }?:"not i fuck i am null";
println("current var ${current}");
kotlin
阅读 62
2022-11-24
var email=null;
email?: println("email is empty");
email?.let{
println("emali not empty");
}
var current= email?.let { "nihao" }?:"not i fuck i am null";
println("current var ${current}");
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