Function parseDataValue

src/data/helper/dataValueHelper.ts:36–73

(
    value: any,
    // For high performance, do not omit the second param.
    opt: {
        // Default type: 'number'. There is no 'unknown' type. That is, a string
        // will be parsed to NaN if do not set `type` as 'ordinal'. It has been
        // the logic in `List.ts` for long time. Follow the same way if you need
        // to get same result as List did from a raw value.
        type?: DimensionType
    }
)

 * For backward compatibility, do not modify it until you have to!
 */
export function parseDataValue(
    value: any,
    // For high performance, do not omit the second param.
    opt: {
        // Default type: 'number'. There is no 'unknown' type. That is, a string
        // will be parsed to NaN if do not set `type` as 'ordinal'. It has been
        // the logic in `List.ts` for long time. Follow the same way if you need
        // to get same result as List did from a raw value.
        type?: DimensionType
    }
): ParsedValue {
    // Performance sensitive.
    const dimType = opt && opt.type;
    if (dimType === 'ordinal') {
        // If given value is a category string
        return value;
    }

    if (dimType === 'time'
        // spead up when using timestamp
        && !isNumber(value)
        && value != null
        && value !== '-'
    ) {
        value = +parseDate(value);
    }

    // dimType defaults 'number'.
    // If dimType is not ordinal and value is null or undefined or NaN or '-',
    // parse to NaN.
    // number-like string (like ' 123 ') can be converted to a number.
    // where null/undefined or other string will be converted to NaN.
    return (value == null || value === '')
        ? NaN
        // If string (like '-'), using '+' parse to NaN
        // If object, also parse to NaN
        : Number(value);
};