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86 lines
1.9 KiB
86 lines
1.9 KiB
4 years ago
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## filter_table
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### Instructions
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- Define the functions:
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- new: creates a new empty table.
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- add_rows: adds a new row to the table from a slice of strings.
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- filter_cols: that receives a closure that receives a `&str` and returns a `bool` value:
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- filter_cols returns a table with all the columns that yielded true when applied to the header.
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- filter_rows: that receives a closure that receives a `&str` and returns a `bool` value
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- filter_rows returns a table with all the columns that yielded true when applied to the elements of the selected column.
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### Expected function
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```rust
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pub struct Table {
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pub headers: Vec<String>,
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pub body: Vec<Vec<String>>,
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}
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impl Table {
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pub fn new() -> Table {
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}
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pub fn add_row(&mut self, row: &[String]) {
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}
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pub fn filter_col(&self, filter: ) -> Option<Self> {
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}
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pub fn filter_row(&self, col_name: &str, filter: ) -> Option<Self> {
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}
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}
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```
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### Usage
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Here is a possible test for your function:
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```rust
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fn main() {
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let mut table = Table::new();
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table.headers = vec![
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"Name".to_string(),
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"Last Name".to_string(),
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"ID Number".to_string(),
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];
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table.add_row(&[
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"Adam".to_string(),
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"Philips".to_string(),
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"123456789".to_string(),
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]);
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table.add_row(&[
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"Adamaris".to_string(),
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"Shelby".to_string(),
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"1111123456789".to_string(),
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]);
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table.add_row(&[
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"Ackerley".to_string(),
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"Philips".to_string(),
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"123456789".to_string(),
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]);
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let filter_names = |col: &str| col == "Name";
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println!("{:?}", table.filter_col(filter_names));
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let filter_philips = |lastname: &str| lastname == "Philips";
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println!("{:?}", table.filter_row("Last Name", filter_philips));
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}
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```
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And its output:
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```console
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student@ubuntu:~/[[ROOT]]/test$ cargo run
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Some(Table { headers: ["Name"], body: [["Adam"], ["Adamaris"], ["Ackerley"]] })
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Some(Table { headers: ["Name", "Last Name", "ID Number"], body: [["Adam", "Philips", "123456789"], ["Ackerley", "Philips", "123456789"]] })
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student@ubuntu:~/[[ROOT]]/test$
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```
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