API Reference > geometry-core > ArraysAndInterfaces > GrowableBlockedArray > newBlockIndex newBlockIndex MethodProtected Return the starting index of a block of (zero-initialized) doubles at the end. this.data is reallocated if needed to include the new block. The inUse count is incremented to include the new block. The returned block is an index to the Float64Array (not a block index) newBlockIndex(): number Returns - number Defined in core/geometry/src/geometry3d/GrowableBlockedArray.ts Line 81 Last Updated: 15 June, 2021