stringx candidate

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// TruncateBytes truncate []byte to specific length
func TruncateBytes(content []byte, length int) []byte {
	if len(content) > length {
		return content[:length]
	}
	return content
}

// TruncateBytesToString ...
func TruncateBytesToString(content []byte, length int) string {
	s := TruncateBytes(content, length)
	return string(s)
}

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• RepeatN(s string, n int) string use strings.Builder

• RepeatChar(c rune, n int) string use strings.Builder

• IsNumeric(s string) bool use unicode.IsDigit(v)

• IsAlphanumeric(s string) bool use isAlphanumeric(v)

• IsAlpha(s string) bool use unicode.IsLetter(v)

• ContainsAnySubstrings(s string, subs []string) bool use strings.Contains

• padLeft / padRight to fixed length with specific char

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SplitIntoInt64s(s string) ([]int64, error)
JoinInt64s(l []int64) string

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• SplitInt 1,2,3,4 to []int{1,2,3,4}
• Join []string{"a", "b"} to a,b
• SubString