46 lines
1.4 KiB
Text
46 lines
1.4 KiB
Text
// version 1.1.51
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typealias Table = List<List<String>>
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/* Note that if ordering is specified, first two parameters are ignored */
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fun Table.sort(
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column: Int = 0,
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reverse: Boolean = false,
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ordering: Comparator<List<String>> =
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if (!reverse) compareBy { it[column] }
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else compareByDescending { it[column] }
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) = this.sortedWith(ordering)
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fun Table.print(title: String) {
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println(title)
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for (i in 0 until this.size) {
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for (j in 0 until this[0].size) System.out.print("%-3s ".format(this[i][j]))
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println()
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}
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println()
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}
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fun main(args: Array<String>) {
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val table = listOf(
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listOf("a", "b", "c"),
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listOf("", "q", "z"),
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listOf("zap", "zip", "Zot")
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)
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table.print("Original:")
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val titles = listOf(
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"Sorted by col 0:", "Sorted by col 1:", "Sorted by col 2:",
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"Reverse sorted by col 0:", "Reverse sorted by col 1:", "Reverse Sorted by col 2"
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)
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val params = listOf(
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0 to false, 1 to false, 2 to false, 0 to true, 1 to true, 2 to true
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)
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for ((i, title) in titles.withIndex()) {
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val table2 = table.sort(params[i].first, params[i].second)
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table2.print(title)
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}
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// using non-default Comparator (case insensitive by col 2, reversed)
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val comp: Comparator<List<String>> = compareByDescending { it[2].toLowerCase() }
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val table3 = table.sort(ordering = comp)
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table3.print("Reverse case insensitive sort by col 2:")
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}
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