Sha256: 8e492ec31252bc085b43cc0fed93c60616456acb3fa1f9e017e3929ca5114856
Contents?: true
Size: 1.1 KB
Versions: 206
Compression:
Stored size: 1.1 KB
Contents
package wordy
import (
"strconv"
"strings"
)
func Answer(q string) (a int, ok bool) {
w := strings.Fields(q)
if len(w) < 3 { // length check for first two words and last word
return
}
if w[0] != "What" || w[1] != "is" { // first two words required
return
}
w = w[2:]
last := len(w) - 1
wl := w[last]
if wl[len(wl)-1] != '?' { // trailing ? required
return
}
w[last] = wl[:len(wl)-1]
a, err := strconv.Atoi(w[0]) // first word after preamble must be a number
if err != nil {
return
}
for i := 1; i < len(w); i++ { // remainder of q must alternate between op, number
op := w[i]
i++
switch op {
case "multiplied", "divided":
if i == len(w) || w[i] != "by" { // length check, required word
return
}
i++ // consume
}
if i == len(w) { // length check for operand
return
}
x, err := strconv.Atoi(w[i]) // must be a number
if err != nil {
return
}
switch op { // apply operator
case "plus":
a += x
case "minus":
a -= x
case "multiplied":
a *= x
case "divided":
a /= x
default: // valid operator not found
return
}
}
return a, true
}
Version data entries
206 entries across 206 versions & 1 rubygems