Parsing a string of array of arrays-CodePudding

I have a string input of the following format:

[[10.5,125.7], [60.5, 25.6] ....]]

How can one parse something like this in Kotlin? This should end up as array of arrays of floats.

CodePudding user response：

For a List<List<Float>>:

val result = text
  .removeSurrounding("[[", "]]").split("], [", "],[")
  .map { it.split(",").map { s -> s.toFloat() } }

For an Array<Array<Float>>:

val result = text
  .removeSurrounding("[[", "]]").split("], [", "],[")
  .map { it.split(",").map { s -> s.toFloat() }.toTypedArray() }
  .toTypedArray()

CodePudding user response：

This format is standard format of json array you can use moshi library for parse json to kotlin models:

val json = "[[10.5,125.7], [60.5, 25.6]]"
val moshi: Moshi = Moshi.Builder().add(CookieMoshiAdapter()).build()
val type = Types.newParameterizedType(List::class.java, List::class.java, Float::class.javaObjectType)
val adapter: JsonAdapter<List<List<Float>>> = moshi.adapter(type)

val list = adapter.fromJson(json)!!