37 lines
693 B
Go
37 lines
693 B
Go
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package diamond
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import (
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"errors"
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"strings"
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)
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const testVersion = 1
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func Gen(c byte) (string, error) {
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if c > 'Z' || c < 'A' {
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return "", errors.New("Out of Range")
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}
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d := rune(strings.ToUpper(string(c))[0])
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var ret string
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for i := 'A'; i <= d; i++ {
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ret += PrintRow(i, d) + "\n"
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}
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for i := d - 1; i >= 'A'; i-- {
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ret += PrintRow(i, d) + "\n"
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}
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return ret, nil
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}
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func PrintRow(rowChar rune, genChar rune) string {
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var ret string
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ret += strings.Repeat(" ", int(genChar-rowChar))
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ret += string(rowChar)
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if rowChar > 'A' {
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ret += strings.Repeat(" ", (2*int(rowChar-'A') - 1))
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ret += string(rowChar)
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}
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ret += strings.Repeat(" ", int(genChar-rowChar))
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return ret
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}
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