# LeetCode Solution, Medium, 194. Transpose File

# [194. Transpose File](https://leetcode.com/problems/transpose-file/)

### 題目敘述

Given a text file `file.txt`, transpose its content.

You may assume that each row has the same number of columns and each field is separated by the `' '` character.

**Example:**

If `file.txt` has the following content:

    name age
    alice 21
    ryan 30

Output the following:

    name alice ryan
    age 21 30

#### 題目翻譯

翻轉資料，將原本的行列互換。

### 解法解析

這邊是先使用 `head -1 file.txt | wc -w | xargs seq 1` 找出說總共有多少個欄位。之後將其結果當作參數，利用 `xargs` 丟到 `cut -d ' ' -f{} file.txt | paste -sd ' ' -` 將其翻轉。

#### 解法範例

##### Bash

```bash
# Read from the file file.txt and print its transposed content to stdout.
head -1 file.txt | wc -w | xargs seq 1 | xargs -I{} -n 1 sh -c "cut -d ' ' -f{} file.txt | paste -sd ' ' -"
```