15: Add solutions to section "option".

Dependencies

• [2] H6XH45OP 0

Change contents

• edit in exercises/option/option3.rs at line 3
  [2.116902]→[2.116902:116920](∅→∅)
  −

  − // I AM NOT DONE
• replacement in exercises/option/option3.rs at line 13
  [2.117049]→[2.117049:117115](∅→∅)
  − Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y),
  [2.117049]

  [2.117115]
  + Some(ref p) => println!("Co-ordinates are {},{} ", p.x, p.y),
• edit in exercises/option/option2.rs at line 3
  [2.117314]→[2.117314:117332](∅→∅)
  −

  − // I AM NOT DONE
• replacement in exercises/option/option2.rs at line 7
  [2.117472]→[2.117472:117499](∅→∅)
  − word = optional_word {
  [2.117472]

  [2.117499]
  + if let Some(word) = optional_word {
• replacement in exercises/option/option2.rs at line 20
  [2.117934]→[2.117934:117978](∅→∅)
  − integer = optional_integers_vec.pop() {
  [2.117934]

  [2.117978]
  + while let Some(Some(integer)) = optional_integers_vec.pop() {
• edit in exercises/option/option1.rs at line 3
  [2.118148]→[2.118148:118166](∅→∅)
  −

  − // I AM NOT DONE
• replacement in exercises/option/option1.rs at line 10
  [2.118338]→[2.118338:118382](∅→∅)
  − print_number(13);

  − print_number(99);
  [2.118338]

  [2.118382]
  + print_number(Some(13));

  + print_number(Some(99));
• replacement in exercises/option/option1.rs at line 13
  [2.118383]→[2.118383:118422](∅→∅)
  − let mut numbers: [Option<u16>; 5];
  [2.118383]

  [2.118422]
  + let mut numbers: [Option<u16>; 5] = [Some(0); 5];
• replacement in exercises/option/option1.rs at line 19
  [2.118535]→[2.118535:118583](∅→∅)
  − numbers[iter as usize] = number_to_add;
  [2.118535]

  [2.118583]
  + numbers[iter as usize] = Some(number_to_add);