根据固定长度将文件中的每一行拆分为带有分隔符的子字符串

Question

我需要一些帮助来将文件转换为具有以下要求的新文件：

Split each row (long string) into sub-string based on fixed length

use pipe delimiter "|" between each sub-string

leave last undefined column (sub-string) as-is, but add "|" before it.

这里是例子，假设一个文件 (test.dat) 有 2 行：

PG123ABCD A 000{000
MK789HJKL32H00

Column 1: length(2)
Column 2: length(3) 
Column 3: length(4)
Column 4: length(3)
Column 5: undefined, use all remaining value

下面是我需要的最终输出。该示例只有 2 行，假设我有一个包含 1k+ 相似行的文件，并且我需要根据上述要求将原始文件转换为新文件。

PG|123|ABCD| A |000{000
MK|789|HJKL|32H|00

Answer 1

cut -b 1-2,3-5,6-9,10-12,13-500 --output-delimiter='|' test.dat > 1.dat

我写了上面的代码，它输出的正是我需要的。

The only question I have is last column, I used 13-500 as fixed length for the undefined column, however the length of the undefined remaining string varies in different rows, is there a generic way to define the last column's length? e.g., something like 13-max_lengh_of_the_row

根据固定长度将文件中的每一行拆分为带有分隔符的子字符串

Split each row in a file into substrings with delimiter based on fixed length

linux

string

split

offset

delimiter