不区分大小写的时候

Question

默认情况下，是否可以when String比较时不区分大小写？

when (subtype.toLowerCase()) {
    MessagingClient.RTC_SUBTYPE.sdp.toString().toLowerCase() -> onSDPMessageReceived(topic, sender, data!!)
    MessagingClient.RTC_SUBTYPE.bye.toString().toLowerCase() -> onRTCBYEMessageReceived(topic, sender)
    MessagingClient.RTC_SUBTYPE.negotiationOffer.toString().toLowerCase() -> onNegotiationOfferMessageReceived(sender, data!!)
}

这有太多重复的代码！ 另请注意， MessagingClient.RTC_SUBTYPE是enum class ，第一行的subtype是从某个客户端接收的，因此我们必须对其进行相应处理。

Answer 1

我会像这样将subtype转换为MessagingClient.RTC_SUBTYPE ：

val subtypeEnum = MessagingClient.RTC_SUBTYPE.values().firstOrNull {
   it.name.equals(subtype, ignoreCase = true) 
} ?: throw IllegalArgumentException("${subtype} no value of MessagingClient.RTC_SUBTYPE match")

然后在when使用它

when (subtypeEnm) {
    MessagingClient.RTC_SUBTYPE.sdp -> onSDPMessageReceived(topic, sender, data!!)
    MessagingClient.RTC_SUBTYPE.bye -> onRTCBYEMessageReceived(topic, sender)
    MessagingClient.RTC_SUBTYPE.negotiationOffer -> onNegotiationOfferMessageReceived(sender, data!!)
}

Answer 2

var s1 =editText.text.toString()
var s2=textView_.text
var s3 =s1.equals(s2 ,true)