Things I learned

• Use cargo (not that much)
• If you want to get an element in a vec with a variable index, the index needs to be usize. Logic as vec size depend on the system.
• You can pass argument to the binarie ran by cargo run with -- --option
• Learn git !
• Watch out for stack. Overflow is fast with array. Better use heap type like vec.
• Regex
• more to come...