URL questions# Programming - 葵花宝典
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Since pages can have multiple URLs pointing to them, how can you make sure you
've never seen the same CONTENT before?
我想到的做法是: 建立一个URL buffer, 然后 新的 URL 与 buffer 里的 URL 进行比较
，如果有相同的，then have seen the same CONTENT; otherwise never seen.
've never seen the same CONTENT before?
我想到的做法是: 建立一个URL buffer, 然后 新的 URL 与 buffer 里的 URL 进行比较
，如果有相同的，then have seen the same CONTENT; otherwise never seen.