81 lines
1.2 KiB
Go
81 lines
1.2 KiB
Go
package match
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// todo common table of rune's length
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import (
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"fmt"
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"strings"
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)
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const lenOne = 1
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const lenZero = 0
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const lenNo = -1
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type Matcher interface {
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Match(string) bool
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Index(string) (int, []int)
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Len() int
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String() string
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}
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type Matchers []Matcher
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func (m Matchers) String() string {
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var s []string
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for _, matcher := range m {
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s = append(s, fmt.Sprint(matcher))
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}
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return fmt.Sprintf("%s", strings.Join(s, ","))
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}
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// appendMerge merges and sorts given already SORTED and UNIQUE segments.
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func appendMerge(target, sub []int) []int {
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lt, ls := len(target), len(sub)
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out := make([]int, 0, lt+ls)
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for x, y := 0, 0; x < lt || y < ls; {
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if x >= lt {
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out = append(out, sub[y:]...)
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break
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}
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if y >= ls {
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out = append(out, target[x:]...)
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break
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}
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xValue := target[x]
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yValue := sub[y]
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switch {
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case xValue == yValue:
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out = append(out, xValue)
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x++
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y++
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case xValue < yValue:
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out = append(out, xValue)
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x++
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case yValue < xValue:
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out = append(out, yValue)
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y++
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}
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}
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target = append(target[:0], out...)
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return target
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}
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func reverseSegments(input []int) {
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l := len(input)
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m := l / 2
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for i := 0; i < m; i++ {
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input[i], input[l-i-1] = input[l-i-1], input[i]
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}
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}
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