Method getMinMax

src/core/core.datasetController.js:622–660

* @protected

(scale, canStack)

	 * @protected
	 */
  getMinMax(scale, canStack) {
    const meta = this._cachedMeta;
    const _parsed = meta._parsed;
    const sorted = meta._sorted && scale === meta.iScale;
    const ilen = _parsed.length;
    const otherScale = this._getOtherScale(scale);
    const stack = createStack(canStack, meta, this.chart);
    const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};
    const {min: otherMin, max: otherMax} = getUserBounds(otherScale);
    let i, parsed;

    function _skip() {
      parsed = _parsed[i];
      const otherValue = parsed[otherScale.axis];
      return !isFinite(parsed[scale.axis]) || otherMin > otherValue || otherMax < otherValue;
    }

    for (i = 0; i < ilen; ++i) {
      if (_skip()) {
        continue;
      }
      this.updateRangeFromParsed(range, scale, parsed, stack);
      if (sorted) {
        // if the data is sorted, we don't need to check further from this end of array
        break;
      }
    }
    if (sorted) {
      // in the sorted case, find first non-skipped value from other end of array
      for (i = ilen - 1; i >= 0; --i) {
        if (_skip()) {
          continue;
        }
        this.updateRangeFromParsed(range, scale, parsed, stack);
        break;
      }
    }
    return range;
  }

  getAllParsedValues(scale) {
    const parsed = this._cachedMeta._parsed;