Method clone

src/data/DataStore.ts:1228–1252

* Clone shallow. * * @param clonedDims Determine which dims to clone. Will share the data if not specified.

(clonedDims?: DimensionIndex[], ignoreIndices?: boolean)

     * @param clonedDims Determine which dims to clone. Will share the data if not specified.
     */
    clone(clonedDims?: DimensionIndex[], ignoreIndices?: boolean): DataStore {
        const target = new DataStore();
        const chunks = this._chunks;
        const clonedDimsMap = clonedDims && reduce(clonedDims, (obj, dimIdx) => {
            obj[dimIdx] = true;
            return obj;
        }, {} as Record<DimensionIndex, boolean>);

        if (clonedDimsMap) {
            for (let i = 0; i < chunks.length; i++) {
                // Not clone if dim is not picked.
                target._chunks[i] = !clonedDimsMap[i] ? chunks[i] : cloneChunk(chunks[i]);
            }
        }
        else {
            target._chunks = chunks;
        }
        this._copyCommonProps(target);

        if (!ignoreIndices) {
            target._indices = this._cloneIndices();
        }
        target._updateGetRawIdx();
        return target;
    }

    private _copyCommonProps(target: DataStore): void {
        target._count = this._count;