18 lines
415 B
Go
18 lines
415 B
Go
package stringmanip
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// Substring provides a safe way to extract a substring from a UTF-8 string.
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// From this discussion:
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// https://groups.google.com/d/msg/golang-nuts/cGq1Irv_5Vs/0SKoj49BsWQJ
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func Substring(s string, p, l int) string {
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if p < 0 || l <= 0 {
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return ""
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}
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c := []rune(s)
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if p > len(c) {
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return ""
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} else if p+l > len(c) || p+l < p {
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return string(c[p:])
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}
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return string(c[p : p+l])
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}
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