novemberkilo commented on a change in pull request #414:
URL: https://github.com/apache/arrow-rs/pull/414#discussion_r646126995
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File path: arrow/src/array/array_binary.rs
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@@ -613,6 +613,32 @@ impl Array for FixedSizeBinaryArray {
}
/// A type of `DecimalArray` whose elements are binaries.
+///
+/// # Examples
+///
+/// ```
+/// use arrow::array::{ArrayData, Array, DecimalArray};
+/// use arrow::buffer::Buffer;
+/// use arrow::datatypes::DataType;
+/// // let val_8887: [u8; 16] = [192, 219, 180, 17, 2, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0];
+/// // let val_neg_8887: [u8; 16] = [64, 36, 75, 238, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255];
+/// let values: [u8; 32] = [
+/// 192, 219, 180, 17, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 36, 75,
238, 253,
+/// 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+/// ];
+/// let array_data = ArrayData::builder(DataType::Decimal(23, 6))
+/// .len(2)
+/// .add_buffer(Buffer::from(&values[..]))
+/// .build();
+/// let decimal_array = DecimalArray::from(array_data);
+/// assert_eq!(2, decimal_array.len());
+/// assert_eq!(8_887_000_000, decimal_array.value(0));
+/// assert_eq!(-8_887_000_000, decimal_array.value(1));
+/// assert_eq!(16, decimal_array.value_length());
+/// assert_eq!(23, decimal_array.precision());
+/// assert_eq!(6, decimal_array.scale());
Review comment:
@alamb I have followed your suggestion to replace the example with one
that uses `DecimalBuilder` instead. If I am following correctly, I won't be
able to really use any of #406 there will I?
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