Module arrow::util::string_writer [−][src]
Expand description
String Writer
This string writer encapsulates std::string::String
and
implements std::io::Write
trait, which makes String as a
writable object like File.
Example:
use arrow::array::*; use arrow::csv; use arrow::datatypes::*; use arrow::record_batch::RecordBatch; use arrow::util::string_writer::StringWriter; use std::sync::Arc; let schema = Schema::new(vec![ Field::new("c1", DataType::Utf8, false), Field::new("c2", DataType::Float64, true), Field::new("c3", DataType::UInt32, false), Field::new("c3", DataType::Boolean, true), ]); let c1 = StringArray::from(vec![ "Lorem ipsum dolor sit amet", "consectetur adipiscing elit", "sed do eiusmod tempor", ]); let c2 = PrimitiveArray::<Float64Type>::from(vec![ Some(123.564532), None, Some(-556132.25), ]); let c3 = PrimitiveArray::<UInt32Type>::from(vec![3, 2, 1]); let c4 = BooleanArray::from(vec![Some(true), Some(false), None]); let batch = RecordBatch::try_new( Arc::new(schema), vec![Arc::new(c1), Arc::new(c2), Arc::new(c3), Arc::new(c4)], ) .unwrap(); let sw = StringWriter::new(); let mut writer = csv::Writer::new(sw); writer.write(&batch).unwrap();
Structs
StringWriter |