目录引言一、文件内容查看工具：从快速浏览到深度分析1. cat：小文件查看2. tac：逆向查看3. more：大文件分屏查看器4. less：增强版分屏查看器5. head/tail：文件头尾内容提取（1）head：查看文件头部（2）tail：查
I have a NSMutableArray I get by loading a plist into it. The date field comes in as a string and i want to change it into a nsdate. I can change an nsstring into an nsdate.
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