26 lines
407 B
Go
26 lines
407 B
Go
package clean
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import (
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"strings"
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)
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// Hex removes invalid character from a hex string and makes it lowercase.
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func Hex(s string) string {
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if s == "" || reject(s, 1024) {
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return ""
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}
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s = strings.ToLower(strings.TrimSpace(s))
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// Remove all invalid characters.
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s = strings.Map(func(r rune) rune {
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if (r < '0' || r > '9') && (r < 'a' || r > 'f') {
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return -1
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}
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return r
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}, s)
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return s
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}
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