16 lines
590 B
Markdown
16 lines
590 B
Markdown
### Ordinal suffix of number
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Use the modulo operator (`%`) to find values of single and tens digits.
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Find which ordinal pattern digits match.
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If digit is found in teens pattern, use teens ordinal.
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```js
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const toOrdinalSuffix = num => {
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const int = parseInt(num), digits = [(int % 10), (int % 100)],
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ordinals = ['st', 'nd', 'rd', 'th'], oPattern = [1, 2, 3, 4],
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tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19];
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return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0] - 1] : int + ordinals[3];
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};
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// toOrdinalSuffix("123") -> "123rd"
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```
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