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devlogs:15_5_2022 [2022/05/15 17:40]
root 		devlogs:15_5_2022 [2023/10/19 15:25] (current)
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 You can iterate through every value like <del>dish</del> <del>rish</del> **this*** ((haha, I'm so quirky)) You can iterate through every value like <del>dish</del> <del>rish</del> **this*** ((haha, I'm so quirky))
 +
 [[https://doc.rust-lang.org/stable/rust-by-example/std/vec.html|stolen from the rust by example book]] [[https://doc.rust-lang.org/stable/rust-by-example/std/vec.html|stolen from the rust by example book]]
 <code rust>  <code rust> 
 // `Vector`s can be easily iterated over // `Vector`s can be easily iterated over
 println!("Contents of xs:"); println!("Contents of xs:");
-for x in xs.iter() {+for v in x.iter() {
  println!("> {}", x);  println!("> {}", x);
 } }
Line 34: Line 35:
 // A `Vector` can also be iterated over while the iteration // A `Vector` can also be iterated over while the iteration
 // count is enumerated in a separate variable (`i`) // count is enumerated in a separate variable (`i`)
-for (i, x) in xs.iter().enumerate() {+for (i, v) in x.iter().enumerate() {
  println!("In position {} we have value {}", i, x);  println!("In position {} we have value {}", i, x);
 } }
Line 40: Line 41:
 // Thanks to `iter_mut`, mutable `Vector`s can also be iterated // Thanks to `iter_mut`, mutable `Vector`s can also be iterated
 // over in a way that allows modifying each value // over in a way that allows modifying each value
-for x in xs.iter_mut() { +for v in xs.iter_mut() { 
- *x *= 3;+ *v *= 3;
 } }
 println!("Updated vector: {:?}", xs); println!("Updated vector: {:?}", xs);
 </code> </code>
  
 +==== HashMap ====
 +
 +Like dictionaries these use key value pairs. 
 +
 +To make one
 +<code rust>
 +let mut name_and_age = HashMap::new();
 +
 +name_and_age.insert("Gassica",22);
 +name_and_age.insert("Alex",12);
 +
 +name_and_age.get("Alex") //ACCESSING THE VALUE
 +</code>
 +
 +You can also insert "entry"
 +
 +<code rust>
 +name_and_age.entry(String::from("thomas")).or_insert(20); //Insert only if unique
 +</code>
 +
 +which is bascially insert if unique. The aims to finish this by may atleast. (given I spend only a little time a week on it) will prollly do some exercizes thru the week without typing my noon-sense.((but typing this is fun fun fun fun)).
 +
 +{{:devlogs:rustlings_excersizes.png?direct&400|}}
  
  
devlogs/15_5_2022.1652654450.txt.gz · Last modified: 2023/10/13 16:43 (external edit)

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