System.Globalization.DateTimeFormatInfoScanner.ArrayElementsBeginWithDigit C# (CSharp) Method

        private static bool ArrayElementsBeginWithDigit(string [] array)
        {

            for (int i=0; i<array.Length; i++)
            {
                // it is faster to check for space character manually instead of calling IndexOf
                // so we don't have to go to native code side.
                if (array[i].Length > 0 &&
                   array[i][0] >= '0' && array[i][0] <= '9')
                {
                    int index = 1;
                    while (index < array[i].Length && array[i][index] >= '0' && array[i][index] <= '9')
                    {
                        // Skip other digits.
                        index++;
                    }
                    if (index == array[i].Length)
                    {
                        return (false);                        
                    }

                    if (index == array[i].Length - 1)
                    {
                        // Skip known CJK month suffix.
                        // CJK uses month name like "1\x6708", since \x6708 is a known month suffix,
                        // we don't need the UseDigitPrefixInTokens since it is slower.
                        switch (array[i][index])
                        {
                            case '\x6708': // CJKMonthSuff
                            case '\xc6d4': // KoreanMonthSuff
                                return (false);
                        }
                    }
                    return (true);
                }
            }

            return false;
        }                        

        // Token: 0x06002E17 RID: 11799 RVA: 0x000B0C68 File Offset: 0x000AEE68
        internal static FORMATFLAGS GetFormatFlagUseSpaceInMonthNames(string[] monthNames, string[] genitveMonthNames, string[] abbrevMonthNames, string[] genetiveAbbrevMonthNames)
        {
            FORMATFLAGS formatflags = FORMATFLAGS.None;

            formatflags |= ((DateTimeFormatInfoScanner.ArrayElementsBeginWithDigit(monthNames) || DateTimeFormatInfoScanner.ArrayElementsBeginWithDigit(genitveMonthNames) || DateTimeFormatInfoScanner.ArrayElementsBeginWithDigit(abbrevMonthNames) || DateTimeFormatInfoScanner.ArrayElementsBeginWithDigit(genetiveAbbrevMonthNames)) ? FORMATFLAGS.UseDigitPrefixInTokens : FORMATFLAGS.None);
            return(formatflags | ((DateTimeFormatInfoScanner.ArrayElementsHaveSpace(monthNames) || DateTimeFormatInfoScanner.ArrayElementsHaveSpace(genitveMonthNames) || DateTimeFormatInfoScanner.ArrayElementsHaveSpace(abbrevMonthNames) || DateTimeFormatInfoScanner.ArrayElementsHaveSpace(genetiveAbbrevMonthNames)) ? FORMATFLAGS.UseSpacesInMonthNames : FORMATFLAGS.None));
        }