将文件中每行的首字母更改为大写 [英] Changing the first letter of every line in a file to uppercase

问题描述

我需要将文件中每行的首字母更改为大写，例如

I need to change the first letter of every line in a file to uppercase, e.g.

the bear ate the fish.
the river was too fast.

将成为:

The bear ate the fish.
The river was too fast.

• 该文档包含一些特殊字母:a，a，á，à，ǎ，ā，b，c，d，e，e，é，è，è，ě，ē，f，g，h，i，i， í，ì，ǐ，ī，j，k，l，m，n，o，o，ó，ò，ǒ，ō，p，q，r，s，t，u，u，ú，ù，ǔ， ü，ǘ，ǜ，ǚ，ǖ，ū，v，w，x，y和z.
• 这些字母的大写形式为:A，A，Á，À，Ǎ，Ā，B，C，D，E，E，É，È，Ě，Ē，F，G，H，I，I ，Í，Ì，Ǐ，Ī，J，K，L，M，N，O，O，Ó，Ò，Ǒ，Ō，P，Q，R，S，T，U，U，Ú，Ù，Ǔ ，Ü，Ǘ，Ǜ，Ǚ，Ǖ，Ū，V，W，X，Y和Z.

如何将文件中每行的首字母更改为大写?

How can I change the first letter of every line in the file to uppercase?

推荐答案

使用sed:

sed  's/^\(.\)/\U\1/' yourfile > convertedfile

小解释:

• ^代表一行的开始.
• .匹配任何字符
• \U转换为大写
• \( ... \)指定以后要引用的部分(在这种情况下为\1)；括号要在这里转义.
• the ^ represents the start of a line.
• . matches any character
• \U converts to uppercase
• \( ... \) specifies a section to be referenced later (as \1 in this case); parentheses are to be escaped here.

不要不尝试使用一个命令(即 > yourfile )将输出重定向到同一文件，因为这将丢失数据.如果要替换为同一文件，请查看joelparkerhenderson的答案.

Do not try to redirect the output to the same file in one command (i.e. > yourfile) as you will lose your data. If you want to replace in the same file then check out joelparkerhenderson's answer.

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