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Sebastiaan van Stijn
bcc4be9f8b
Inline the sub-slice lookup into stringSliceReplaceAt and use slices.Equal to compare candidate ranges. When a specific index is required, check that position directly instead of searching the full slice. This also fixes overlapping matches and uses slices.Concat to construct the replacement result. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
27 lines
825 B
Go
27 lines
825 B
Go
package main
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import "slices"
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// stringSliceReplaceAt replaces the sub-slice find with the sub-slice replace in s,
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// returning a new slice and a boolean indicating whether the replacement happened.
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// requireIndex is the index at which find must be found, or -1 to disregard it.
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func stringSliceReplaceAt(s, find, replace []string, requireIndex int) ([]string, bool) {
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if len(find) == 0 {
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return s, false
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}
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if requireIndex >= 0 {
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if requireIndex+len(find) > len(s) || !slices.Equal(s[requireIndex:requireIndex+len(find)], find) {
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return s, false
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}
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return slices.Concat(s[:requireIndex], replace, s[requireIndex+len(find):]), true
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}
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for i := range len(s) - len(find) + 1 {
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if slices.Equal(s[i:i+len(find)], find) {
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return slices.Concat(s[:i], replace, s[i+len(find):]), true
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}
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}
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return s, false
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}
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