33 lines
865 B
Go
33 lines
865 B
Go
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package main
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func stringSliceIndex(s, subs []string) int {
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j := 0
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if len(subs) > 0 {
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for i, x := range s {
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if j < len(subs) && subs[j] == x {
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j++
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} else {
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j = 0
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}
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if len(subs) == j {
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return i + 1 - j
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}
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}
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}
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return -1
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}
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// stringSliceReplaceAt replaces the sub-slice find, with the sub-slice replace, in the string
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// slice s, returning a new slice and a boolean indicating if the replacement happened.
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// requireIdx is the index at which old needs to be found at (or -1 to disregard that).
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func stringSliceReplaceAt(s, find, replace []string, requireIndex int) ([]string, bool) {
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idx := stringSliceIndex(s, find)
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if (requireIndex != -1 && requireIndex != idx) || idx == -1 {
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return s, false
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}
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out := append([]string{}, s[:idx]...)
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out = append(out, replace...)
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out = append(out, s[idx+len(find):]...)
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return out, true
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}
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