package example

import (
	"list"

	// The strings package is only imported for some examples in this
	// guide, and is not required when using list.IsSorted.
	"strings"
)

// For lists of numbers or lists of strings, list.IsSorted can be provided
// with the predefined comparator list.Ascending or list.Descending.
isSorted: [1, 2.2, 3] & list.IsSorted(list.Ascending)

// See related content, below, for a list.IsSortedStrings example.
stringsDescending: list.IsSorted(list.Descending) // validation failure
stringsDescending: ["A", "B", "C"]

// Mixed type lists require a custom comparator containing a "less" field that
// encodes a comparison between its "x" and "y" fields, reflecting x<y. See
// list.Sort for details.
structsCustom: list.IsSorted({x: {}, y: {}, less: x.a < y.a})
structsCustom: [{a: 1}, {a: 2}, {a: 3}]

// This comparator tests if lists of strings are in descending order of how
// many "@" characters they contain.
_sortAtSymbolCountDescending: {
	x:    string
	y:    string
	less: strings.Count(x, "@") > strings.Count(y, "@")
}
stringsCountDescending: ["@", "@@", "X"]
stringsCountDescending: list.IsSorted(_sortAtSymbolCountDescending) // validation failure