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mti-eureka-tech-beer

Yuya Kaido
September 28, 2016

 mti-eureka-tech-beer

Yuya Kaido

September 28, 2016
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  1. KotlinɿNull Safety • KotlinͰఆٛ͢Δม਺͸͢΂ͯNonNull  var foo: Int
 foo.toString() //

    ίϯύΠϧΤϥʔ 
 
 var bar: Int = 0
 bar.toString() // ☺ Kotlin Integer foo = null;
 foo.toString(); // Fuck’in NullPointerException Java