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# ==(_:_:)

Creates a column of Booleans by testing whether each element in the
first column is equal to the corresponding element in the second column.

```
static func == (a: MLUntypedColumn, b: MLUntypedColumn) -> MLUntypedColumn
```

## Parameters

`a`

A column.

`b`

A column.

## Return Value

A new column of Booleans if the columns have the same size
and underlying type; otherwise an invalid column.

---

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