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删除重复项

SpreadJS表格编辑器提供了“删除重复项”选项来永久删除所选范围内的重复数据。当用从所选范围内删除重复数据或值时，唯一受影响的是单元格或表格所选范围内的值。单元格或表格所选范围之外的值不会更改或移动。

删除重复数据时，将保留列表中第一次出现的值，但删除其他相同的值。 SpreadJS在 "Data" > "Data Tools" 选项卡组下提供了 "Remove Duplicates" 功能区按钮。

下面的GIF展示了从选定的数据范围中删除重复数据。

用户还可以通过选择"My Data has headers"复选框选项来选择忽略第一行。

在不同类型值中使用"Remove Duplicates"

在公式中使用 单元格中的公式会被之后的单元格复制。下面的GIF展示了在将公式应用于斐波那契数列的单元格区域中使用"Remove Duplicates"。正如下面的GIF中看到的那样，当使用"Remove Duplicates"功能时，它会删除"B3"并将"B4"复制到"B3"，并且随着将"B3"更改为"=B1+B2"，之后的每一个单元格都向前移动一个。
在格式化中使用 使用"Remove Duplicates"时，如果格式和样式各自的值与所选范围内的其他单元格的值相同，则不会将它们视为不同的单元格，会与单元格中的值一起被删除。正如下面的GIF中看到的那样，即使单元格的值为 1、2 和 3，单元格也具有不同的格式。使用"Remove Duplicates"后，所有相同值的单元格都将被删除。
在自动扩展区域中使用 使用"Remove Duplicates"时，如果用户选择表格的一列或多列并单击"Remove Duplicates"，则选择区域会扩展以选择整个表格。
在整个行中使用 使用"remove duplicates"时，如果用户从表格中选择了一个整个行区域，然后设置整个行忽略删除重复值，则重复值不会被删除。在下面的GIF中，只有单元格B3、B4和B5被选中，但在点击"remove duplicates"后，我们有两个选项：- Expand the selection: 此选项为扩展选择整个表格。这是默认选项。
Continue with the current selection: 此选项为让用户继续使用当前选定的单元格范围。

无效选择区域

选择带有其他单元格的表格选择区域 下图展示了选择表格单元格以及其他单元区域，则禁用"Remove Duplicates"选项。
选择数据透视表或数据透视表中的区域 下图展示了从数据透视表中选择单元格区域，则禁用"Remove Duplicates"选项。
选择单独一行 下图展示了如果选择了单独一行，则会出现告警提示。
选择无数据的区域 下图展示了如果选择了没有任何数据的区域，则会出现告警提示。
选择单独的单元格 下图展示了如果选择了单独的单元格，则会出现告警提示。
选择多个区域 下图展示了如果选择了多个区域，则会出现告警提示。