Method _recognizeDimIndex

src/data/SeriesData.ts:434–446

* The meanings of the input parameter `dim`: * * + If dim is a number (e.g., `1`), it means the index of the dimension. * For example, `getDimension(0)` will return 'x' or 'lng' or 'radius'. * + If dim is a number-like string (e.g., `"1"`): * + If there is the same con

(dim: DimensionLoose)

     * @return recognized `DimensionIndex`. Otherwise return null/undefined (means that dim is `DimensionName`).
     */
    private _recognizeDimIndex(dim: DimensionLoose): DimensionIndex {
        if (zrUtil.isNumber(dim)
            // If being a number-like string but not being defined as a dimension name.
            || (
                dim != null
                && !isNaN(dim as any)
                && !this._getDimInfo(dim)
                && (!this._dimOmitted || this._schema.getSourceDimensionIndex(dim) < 0)
            )
        ) {
            return +dim;
        }
    }

    private _getStoreDimIndex(dim: DimensionLoose): DimensionIndex {
        const dimIdx = this.getDimensionIndex(dim);