iOS 字符串「10 lakh」轉數值：印度計數單位解析

單位映射

• thousand = 1,000
• lakh = 100,000 (10^5)
• crore = 10,000,000 (10^7)

解析代碼

- (NSNumber *)parseIndianNumber:(NSString *)str {
    NSArray *parts = [str componentsSeparatedByString:@" "];
    if (parts.count != 2) return @0;
    
    NSNumber *value = @([parts[0] doubleValue]);
    NSString *unit = [parts[1] lowercaseString];
    
    NSDictionary *multipliers = @{
        @"thousand": @1000,
        @"lakh": @100000,
        @"crore": @10000000
    };
    NSNumber *mult = multipliers[unit] ?: @1;
    return @([value doubleValue] * [mult doubleValue]);
}
// 用法: [self parseIndianNumber:@"10 lakh"] -> 1000000