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CIsForCookies
Asked: 2022-03-23 06:30:49 +0800 CST

如何将字符串分成 N 80 个字符行？

  • 772

我想在脚本的开头显示一条欢迎消息：

echo "Running $0 $@"

但$@可能会很长。如何将这条线分成多条最多 80 个字符的行？

command-line

3 个回答

  1. Best Answer

    使用fold.

    echo "Running $0 $@" | fold -sw 80

    -s包裹在空格上。 -w 80将宽度设置为 80 列。

    • 10

  2. 当然fold是最好的选择，但您也可以使用grepor实现此目的sed：

    echo "Running $0 $@" | grep -o '.\{80\}[^ ]* '
#or
echo "Running $0 $@" | sed -E 's/(.{80}[^ ]*) /\1\n/g'

    请注意，这将在 80 个字符 + 1 个单词处中断，因此它可能不适合您。

    • 3

  3. 尽管其他人提到了在达到 80 个字符限制的单词之前换行的工具，但还有另一种工具试图在句子开头之后的结尾之前不换行，并执行其他操作以提高可读性。它的用法类似：

    echo "…" | fmt -w 80

    该-w选项指定文本的最大宽度，但文本将仅使用行的 93%（这可以通过使用 覆盖-g）。

    这是fold格式化文本的方式：

    Although others mentioned tools that break the lines just before the word that 
hits the 80-character limit, there is also another tool that tries to not break 
the lines just before end of after start of a sentence and does other things 
for better readability. Its usage is similar:

    echo "…" | fmt -w 80

The `-w` option specifies the maximum width of the text, but the text will use 
only 93 percent of the line (this can be overridden by using `-g`).

The long sentence that hits the 80 character column count is this one and here.

    这是来自fmt：

    Although others mentioned tools that break the lines just before the word
that hits the 80-character limit, there is also another tool that tries
to not break the lines just before end of after start of a sentence and
does other things for better readability. Its usage is similar:

    echo "…" | fmt -w 80

The `-w` option specifies the maximum width of the text, but the text will
use only 93 percent of the line (this can be overridden by using `-g`).

The long sentence that hits the 80 character column count is this one
and here.

    您会注意到最后一个（正好 80 个字符长）被包装了，但不是在第 75 列（80 的 93%），而是在它之前的一个单词，因为我们不想单独在行上有一个单词（在印刷文本等）。

    • 3

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