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type SortOptions struct {
	Reverse       bool   // -r: reverse the result of comparisons
	Numeric       bool   // -n: compare according to string numerical value
	Unique        bool   // -u: output only unique lines
	IgnoreCase    bool   // -f: fold lower case to upper case characters
	IgnoreLeading bool   // -b: ignore leading blanks
	Dictionary    bool   // -d: consider only blanks and alphanumeric characters
	Key           string // -k: sort via a key
	FieldSep      string // -t: use SEP as field separator
	Check         bool   // -c: check for sorted input
	Stable        bool   // -s: stabilize sort by disabling last-resort comparison
	Output        string // -o: write result to FILE
	JSON          bool   // --json: output as JSON
}

type SortResult struct {
	Lines []string `json:"lines"`
	Count int      `json:"count"`
}

type UniqLine struct {
	Line  string `json:"line"`
	Count int    `json:"count"`
}

type UniqOptions struct {
	Count         bool // -c: prefix lines by the number of occurrences
	Repeated      bool // -d: only print duplicate lines
	AllRepeated   bool // -D: print all duplicate lines
	IgnoreCase    bool // -i: ignore differences in case
	Unique        bool // -u: only print unique lines
	SkipFields    int  // -f: avoid comparing the first N fields
	SkipChars     int  // -s: avoid comparing the first N characters
	CheckChars    int  // -w: compare no more than N characters
	ZeroTerminate bool // -z: line delimiter is NUL, not newline
	JSON          bool // --json: output as JSON
}

type UniqResult struct {
	Lines []UniqLine `json:"lines"`
	Count int        `json:"count"`
}