Parsing a string of array of arrays

Question

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.

Assuming this is JSON, I suggest using some library for parsing JSON format. Even if this is for a very small thing. We should avoid writing our own data parsers. — broot
– broot, Commented Feb 14, 2022 at 19:20

lukas.j · Accepted Answer · 2022-02-14 17:53:50Z

2

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()

edited Feb 14, 2022 at 17:53

answered Feb 14, 2022 at 17:38

lukas.j

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