Place the washed cucumber on a firm, flat, clean surface. Whack it firmly but gently with the flat side of a heavy cleaver or the bottom an 8-inch skillet. Repeat all down its length until it is completely smashed. Chop the cucumber crosswise into 1-inch pieces and transfer to a colander set in a bowl. Toss with salt and refrigerate for 10 minutes. Discard the extracted liquid and transfer the cucumbers to the bowl.
