[CareerCup] 11.4 Sort the File 文件排序 - Grandyang - 博客园



[CareerCup] 11.4 Sort the File 文件排序 - Grandyang - 博客园

[CareerCup] 11.4 Sort the File 文件排序

 

11.4 Imagine you have a 20 GB file with one string per line. Explain how you would sort the file.

 

这道题说给了我们一个20GB大小的文件,每行有一个字符串,让我们给文件内容排序。那么既然强调了这么大的一个文件,肯定不想让我们直接进入内存中,那么我们可以把大文件分块,每块xMB,其中x的大小为我们可用的内存大小,我们对每块分别排序,然后把所有的有序块进行合并,这样我们就能得到一个有序的文件了。


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