合并来自不同文件的列

Question

I have two text files that have these structures:

File 1

Column1:Column2
Column1:Column2
...

File 2

Column3
Column3
...

I would like to create a file that has this file structure:

Column1:Column3
Column1:Column3
...

Open to any suggestions, but it would be nice if the solution can be done from a Bash shell, or sed / awk / perl / etc ...

Answer 1

cut -d: -f1 "File 1" | paste -d: - "File 2"

这会从文件1中删除字段1（由冒号分隔）并将其粘贴到文件2中的唯一列，用冒号分隔输出字段。

Answer 2

Here's an awk solution. It assumes file1 and file2 have an equal number of lines.

awk -F : '{ printf "%s:",$1; getline < "file2"; print }' < file1

Answer 3

Since a pure bash implementation hasn't been suggested, also assuming an equal number of lines (bash v4 only):

mapfile -t file2 < file2

index=0
while IFS=: read -r column1 _; do
        echo "$column1:${file2[index]}"
        ((index++))
done < file1

bash v3:

IFS=$'\n' read -r -d '' file2 < file2

index=0
while IFS=: read -r column1 _; do
        echo "$column1:${file2[index]}"
        ((index++))
done < file1