Function createGetKey

_benchmarks/sample_echarts.js:70485–70519

(data, diffMode, dimension)

    }(ChartView);

    function createGetKey(data, diffMode, dimension) {
      if (!data) {
        return;
      }

      if (diffMode === 'oneToOne') {
        return function (rawIdx, dataIndex) {
          return data.getId(dataIndex);
        };
      }

      var diffByDimName = data.getDimension(dimension);
      var dimInfo = data.getDimensionInfo(diffByDimName);

      if (!dimInfo) {
        var errMsg = '';

        if ("development" !== 'production') {
          errMsg = dimension + " is not a valid dimension.";
        }

        throwError(errMsg);
      }

      var ordinalMeta = dimInfo.ordinalMeta;
      return function (rawIdx, dataIndex) {
        var key = data.get(diffByDimName, dataIndex);

        if (ordinalMeta) {
          key = ordinalMeta.categories[key];
        }

        return key == null || eqNaN(key) ? rawIdx + '' : '_ec_' + key;
      };
    }

    function createEl(elOption) {
      var graphicType = elOption.type;