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leetcode-cn/problem (Chinese)/创建新列 [create-a-new-column].html Normal file
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<pre>
DataFrame <code>employees</code>
+-------------+--------+
| Column Name | Type. |
+-------------+--------+
| name | object |
| salary | int. |
+-------------+--------+
</pre>
<p>一家公司计划为员工提供奖金。</p>
<p>编写一个解决方案，创建一个名为&nbsp;<code>bonus</code>&nbsp;的新列，其中包含&nbsp;<code>salary</code>&nbsp;值的&nbsp;<strong>两倍</strong>。</p>
<p>返回结果格式如下示例所示。</p>
<p>&nbsp;</p>
<p><b>示例 1:</b></p>
<pre>
<b>输入：</b>
DataFrame employees
+---------+--------+
| name | salary |
+---------+--------+
| Piper | 4548 |
| Grace | 28150 |
| Georgia | 1103 |
| Willow | 6593 |
| Finn | 74576 |
| Thomas | 24433 |
+---------+--------+
<b>输出：</b>
+---------+--------+--------+
| name | salary | bonus |
+---------+--------+--------+
| Piper | 4548 | 9096 |
| Grace | 28150 | 56300 |
| Georgia | 1103 | 2206 |
| Willow | 593 | 13186 |
| Finn | 74576 | 149152 |
| Thomas | 24433 | 48866 |
+---------+--------+--------+
<b>解释：</b>
通过将 salary 列中的值加倍创建了一个新的 bonus 列。</pre>