Category:Enterprise resource planning terminologyDifferent-band state in a metamaterial-based plasmonic Fabry-Perot interferometer.
We theoretically study the transmission and reflection characteristics of a 1D Fabry-Perot interferometer composed of a metamaterials-based waveguide structure. In the transmission and reflection characteristics, we predict that the interference pattern can be controlled by changing the polarization direction of the input light. This behavior is the result of the coupling between two transverse resonant modes of the metamaterial-based waveguide structure, which leads to the so-called different-band state.Q:
Kotlin's Stream.map contains an UnsupportedOperationException for empty lists
I'm trying to construct a Stream of a list of elements, if those elements contain a non-null value, I want to keep them, otherwise throw them away.
I'd like to do this in a simple-to-understand way, but while I can do it in a straightforward Java version of the same idea, I can't seem to get Kotlin to play nicely with Streams.
Here's my Kotlin version:
fun getResult(): List {
val list = mutableListOf()
.apply {
// keyed by some unique ID
for (map in mapOf(1L to "a", 2L to "b", 3L to "c")) {
if (map.value!= null)
list += map.value
}
}
return list
}
fun main() {
val result = getResult()
println(result) // returns list {a, b, c}
} be359ba680
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