Method column_by_name

arrow-array/src/array/struct_array.rs:323–328

Return child array whose field name equals to column_name Note: A schema can currently have duplicate field names, in which case the first field will always be selected. This issue will be addressed in [ARROW-11178](https://issues.apache.org/jira/browse/ARROW-11178)

(&self, column_name: &str)

    /// the first field will always be selected.
    /// This issue will be addressed in [ARROW-11178](https://issues.apache.org/jira/browse/ARROW-11178)
    pub fn column_by_name(&self, column_name: &str) -> Option<&ArrayRef> {
        self.column_names()
            .iter()
            .position(|c| c == &column_name)
            .map(|pos| self.column(pos))
    }

    /// Returns a zero-copy slice of this array with the indicated offset and length.
    pub fn slice(&self, offset: usize, len: usize) -> Self {