For loop using batches

forEachBatch.swift

import Foundation

public extension Array {
    
    /**
     Loops through array by batches
     
     - Parameter batchSize: Size of the batch
     - batch: Current batch elements
     - currentNo: Current batch number
     - totalCount: Batches amount
     
     **/
    func forEachBatch(size batchSize: Int, _ transform: (_ batch: [Element], _ currentNo: Int, _ totalCount: Int) throws  -> Void) rethrows{
        
        let count = self.count
        
        // Determine the total number of batches.
        var numBatches = count / batchSize
        numBatches += count % batchSize > 0 ? 1 : 0
        
        for batchNumber in 0 ..< numBatches {
            
            // Determine the range for this batch.
            let batchStart = batchNumber * batchSize
            let batchEnd = batchStart + Swift.min(batchSize, count - batchNumber * batchSize)
            let range = batchStart..<batchEnd

            // Create a batch for this range.
            let batch = Array(self[range])
            try autoreleasepool(invoking: { () -> Void in
                try transform(batch, batchNumber, numBatches)
            })
        }
    }
}

array.forEachBatch(size: batchSize) { (batch, currentNo, totalNo) in
            print(batch, currentNo, totalNo)
 }