fn build_row_index<'a>(
    rows: &'a [Row],
    cost_row_name: &str,
) -> Result<HashMap<&'a str, usize>, Inconsistency> {
    let names = rows.iter().map(|row| row.name.as_str()).collect::<HashSet<_>>();
    debug_assert_eq!(names.len(), rows.len());
    debug_assert!(!names.contains(cost_row_name));

    let index = rows.iter().enumerate()
        .map(|(i, row)| (row.name.as_str(), i))
        .collect::<HashMap<_, _>>();

    if index.values().len() < rows.len() {
        Err(Inconsistency::new("Not all row names are unique"))
    } else {
        Ok(index)
    }
}
/// Extract all row names, and assign to each row a fixed row index.
///
/// This index will be used throughout building the `MPS`, and ordered as in the original problem.
/// It is needed because constraint values for columns might appear in an unsorted order, so then a
/// lookup is practical.
///
/// # Arguments
///
/// * `unstructured_rows`: Collection of unstructured rows, cost row should not be in here.
///
/// # Return value
///
/// Names of all rows (this excludes the cost row) and a map from the name to the index at which
/// they are stored. This arbitrary order is the order in which rows will be stored in the final
/// MPS data structure.
///
/// # Errors
///
/// If there are rows with duplicate names, the MPS is considered inconsistent.
Extract all row names, and assign to each row a fixed row index.
This index will be used throughout building the `MPS`, and ordered as in the original problem.
It is needed because constraint values for columns might appear in an unsorted order, so then a
lookup is practical.
Extract all row names and assign to each row a fixed row index . This index will be used throughout building the ` MPS ` and ordered as in the original problem . It is needed because constraint values for columns might appear in an unsorted order so then a lookup is practical .
fn build_row_index<'a>(
    rows: &'a [Row],
    cost_row_name: &str,
) -> Result<HashMap<&'a str, usize>, Inconsistency> {
    let names = rows.iter().map(|row| row.name.as_str()).collect::<HashSet<_>>();
    debug_assert_eq!(names.len(), rows.len());
    debug_assert!(!names.contains(cost_row_name));
    let index = rows.iter().enumerate()
        .map(|(i, row)| (row.name.as_str(), i))
        .collect::<HashMap<_, _>>();
    if index.values().len() < rows.len() {
        Err(Inconsistency::new("Not all row names are unique"))
    } else {
        Ok(index)
    }
}
fn build_row_index < ' a > ( rows : & ' a [ Row ] , cost_row_name : & str , ) -> Result < HashMap < & ' a str , usize > , Inconsistency > { let names = rows . iter ( ) . map ( | row | row . name . as_str ( ) ) . collect :: < HashSet < _ > > ( ) ; debug_assert_eq ! ( names len ( ) rows len ( ) ) ; debug_assert ! ( names contains ( cost_row_name ) ) ; let index = rows . iter ( ) . enumerate ( ) . map ( | ( i , row ) | ( row . name . as_str ( ) , i ) ) . collect :: < HashMap < _ , _ > > ( ) ; if index . values ( ) . len ( ) < rows . len ( ) { Err ( Inconsistency :: new ( " " ) ) } else { Ok ( index ) } }
Extract all row names, and assign to each row a fixed row index.
Extract all row names and assign to each row a fixed row index .
rows
&'a [Row]
cost_row_name
&str
rows
&'a [Row]
cost_row_name
&str
return value
Names of all rows (this excludes the cost row) and a map from the name to the index at which
they are stored. This arbitrary order is the order in which rows will be stored in the final
MPS data structure.
Names of all rows ( this excludes the cost row ) and a map from the name to the index at which they are stored . This arbitrary order is the order in which rows will be stored in the final MPS data structure .
errors
If there are rows with duplicate names, the MPS is considered inconsistent.
If there are rows with duplicate names the MPS is considered inconsistent .