bash - 如何查找和替换至少有一个字母且没有数字的项目？

Question

我需要-用 `\texthyphen ' 替换文档中的所有 '，但前提是它至少由一个字母限定，无论是之前还是之后，但如果之前或之后恰好是一个数字，则不需要。例如：

• A-B变成A\texthyphen B.
• a-b变成a\texthyphen b.
• %-b变成%\texthyphen b.
• %-%不变，因为它不靠近任何字母。
• 1-2不变，因为它接近数字。
• A-2不变，因为它接近一个数字。

如何将连字符替换为\texthyphen，但仅在字母旁边而不是数字旁边时？

Answer 1

sed -e 's/\([[:alpha:]]\)-\([^[:digit:]]\)/\1\\texthyphen \2/g' -e 's/\([^[:digit:]]\)-\([[:alpha:]]\)/\1\\texthyphen \2/g' -e 's/^-\([:alpha:]\)/\\texthyphen \1/'

Answer 2

我刚刚遇到可以处理类似 Perl 的正则表达式的ssed(super )。sed它应该在类似 Debian 的系统上可用，不确定其他系统。

$ echo '    A-B becomes A\texthyphen B.
    a-b becomes a\texthyphen b.
    %-b becomes %\texthyphen b.
    %-% is unchanged, because it is not near any letter.
    1-2 is unchanged, because it is near numbers.
    A-2 is unchanged, because it is near one number.' | \
> ssed -R 's/(?<=[A-Za-z])-(?![0-9])|(?<![0-9])-(?=[A-Za-z])/\\texthyphen /g'

给

    A\texthyphen B becomes A\texthyphen B.
    a\texthyphen b becomes a\texthyphen b.
    %\texthyphen b becomes %\texthyphen b.
    %-% is unchanged, because it is not near any letter.
    1-2 is unchanged, because it is near numbers.
    A-2 is unchanged, because it is near one number.

Answer 3

这可能对您有用：

sed 's/\([[:alpha:]]\)-\([^[:digit:]]\)\|\([^[:digit:]]\)-\([[:alpha:]]\)/\1\3\\texthyphen \2\4/g' file