A story that I was determined to hear from the source was the legendary quicksort 'wager'. The story goes that Tony told his boss at Elliott Brothers Ltd that he knew a faster sorting algorithm than the one that he had just implemented for the company. He was told 'I bet you sixpence you don't!'. Lo and behold, quicksort WAS faster. I asked Tony to tell this story pretty much every time we met, because I enjoyed it so much and it always put a smile on both of our faces. To his credit, Tony never tired of telling me this story 'right from the top'. I had hoped to visit again in the past year and record him telling it so that there was a record, but unfortunately this did not happen. However, I discover that it is indeed recorded elsewhere. One detail I might be able to add is that I asked Tony if indeed the wager was paid out or if it had merely been a figure of speech. He confirmed that indeed he WAS paid the wager (!). A detail of this story that I find particularly reflective of Tony's humble personality is that he went ahead and implemented the slower algorithm he was asked to, while he believed quicksort to be faster, and before chiming in with this belief. It speaks to a professionalism that Tony always carried.
Publication date: 02 March 2026 - 10:00，更多细节参见新收录的资料
，详情可参考新收录的资料
30-day money-back guarantee。新收录的资料对此有专业解读
The easiest possible system is that we just re-run everything. Going back to our spreadsheet, every time we update a cell, we go through every cell in the sheet and calculate its value fresh. When a cell references another cell (e.g. =B8), we first calculate the value of the dependency, then carry on calculating the initial cell’s value. Eventually, we will recursively have updated every cell in the sheet.