Improved speller readability
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parent
5bc4119abb
commit
79bb3b15d7
1 changed files with 25 additions and 27 deletions
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@ -6,7 +6,7 @@ import (
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"strings"
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)
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var numToDigits = []string{
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var digits = []string{
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"", "one", "two", "three", "four", "five",
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"six", "seven", "eight", "nine",
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}
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@ -41,48 +41,46 @@ func Spell(n int64) string {
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if sign {
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n = -n
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}
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num, digits := strings.Builder{}, digitsReversedSlice(n)
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num, numDigits := strings.Builder{}, digitsReversedSlice(n)
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// 35 is the optimal number which gives approx needed
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// space for the number in 1 allocation
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num.Grow(len(digits) * 35)
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num.Grow(len(numDigits) * 35)
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if sign {
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num.WriteString("minus ")
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}
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largeIndex, iters := 0, 0
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for i := len(digits) - 1; i >= 0; i, largeIndex = i-3, largeIndex+1 {
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first, second, third := digits[i-2], digits[i-1], digits[i]
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if first == 0 && second == 0 && third == 0 {
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for i, largeIndex := len(numDigits)-1, 0; i >= 0; i, largeIndex = i-3, largeIndex+1 {
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hundreds, tens, ones := numDigits[i], numDigits[i-1], numDigits[i-2]
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hundredsPresent, tensPesent, onesPresent := hundreds != 0, tens != 0, ones != 0
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if !hundredsPresent && !tensPesent && !onesPresent {
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continue
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}
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if iters != 0 {
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num.WriteRune(' ')
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}
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hundreds := numToDigits[third]
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if hundreds != "" {
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num.WriteString(hundreds)
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if hundredsPresent {
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num.WriteString(digits[hundreds])
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num.WriteString(" hundred")
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if second != 0 || first != 0 {
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if tensPesent || onesPresent {
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num.WriteRune(' ')
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}
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}
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if second > 1 {
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num.WriteString(decs[second])
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if first > 0 {
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num.WriteRune('-')
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num.WriteString(numToDigits[first])
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}
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} else if second == 1 {
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num.WriteString(teens[first])
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} else {
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if first > 0 {
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num.WriteString(numToDigits[first])
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if tensPesent {
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if tens == 1 {
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num.WriteString(teens[ones])
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} else {
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num.WriteString(decs[tens])
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if onesPresent {
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num.WriteRune('-')
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}
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}
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}
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if onesPresent && tens != 1 {
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num.WriteString(digits[ones])
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}
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if largeIndex < len(large) {
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num.WriteRune(' ')
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num.WriteString(large[largeIndex])
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}
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iters++
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num.WriteRune(' ')
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}
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return num.String()
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output := num.String()
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output = output[:len(output)-1]
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return output
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}
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