Score a password
The sign-up form shows a strength meter with five segments, one for each rule the password satisfies.
- One point each for: being at least 8 characters, containing a lowercase letter, containing an uppercase letter, containing a digit, and containing anything else.
- The score is therefore between 0 and 5.
passwordScore(password: string) → int
Go needs a compiler and Drill does not host one yet, so this page is the reference rather than an exercise: the problem, worked examples, and the solution in full. To type it out, the same problem runs in Python.
Where you start
func passwordScore(password string) int {
}Worked examples
| Call | Result |
|---|---|
passwordScore("abc") | 1 |
passwordScore("abcdefgh") | 2 |
passwordScore("Abcdefg1") | 4 |
passwordScore("Abcdefg1!") | 5 |
Hint
Five independent booleans, added up. No early returns.
Reference solution in Go
func passwordScore(password string) int {
lower, upper, digit, other := false, false, false, false
for i := 0; i < len(password); i++ {
c := password[i]
switch {
case c >= 'a' && c <= 'z':
lower = true
case c >= 'A' && c <= 'Z':
upper = true
case c >= '0' && c <= '9':
digit = true
default:
other = true
}
}
n := 0
if len(password) >= 8 {
n++
}
for _, f := range []bool{lower, upper, digit, other} {
if f {
n++
}
}
return n
}