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2.0 KiB
2.0 KiB
filter_table
Instructions
- Define the associated functions for the
Table
struct:new
: which creates a new empty table.add_rows
: which adds a new row to the table from a slice of strings.filter_cols
: which receives a closure and returns a table with all the columns that yielded true when applying that closure. The closure will receive a&str
and return abool
value.filter_rows
: which receives a closure and returns a table with all the rows that yielded true when applied to the elements of the selected column. The closure will receive a&str
and return abool
value.
Expected functions and Structures
#[derive(Clone, Debug, PartialEq)]
pub struct Table {
pub headers: Vec<String>,
pub body: Vec<Vec<String>>,
}
impl Table {
pub fn new() -> Table {
}
pub fn add_row(&mut self, row: &[String]) {
}
pub fn filter_col(&self, filter: T) -> Option<Self> {
}
pub fn filter_row(&self, col_name: &str, filter: T) -> Option<Self> {
}
}
Usage
Here is a possible program to test your function:
fn main() {
let mut table = Table::new();
table.headers = vec![
"Name".to_string(),
"Last Name".to_string(),
"ID Number".to_string(),
];
table.add_row(&[
"Adam".to_string(),
"Philips".to_string(),
"123456789".to_string(),
]);
table.add_row(&[
"Adamaris".to_string(),
"Shelby".to_string(),
"1111123456789".to_string(),
]);
table.add_row(&[
"Ackerley".to_string(),
"Philips".to_string(),
"123456789".to_string(),
]);
let filter_names = |col: &str| col == "Name";
println!("{:?}", table.filter_col(filter_names));
let filter_philips = |lastname: &str| lastname == "Philips";
println!("{:?}", table.filter_row("Last Name", filter_philips));
}
And its output:
$ cargo run
Some(Table { headers: ["Name"], body: [["Adam"], ["Adamaris"], ["Ackerley"]] })
Some(Table { headers: ["Name", "Last Name", "ID Number"], body: [["Adam", "Philips", "123456789"], ["Ackerley", "Philips", "123456789"]] })
$