DMleadgen
46d973904b
Next.js website for Rocky Mountain Vending company featuring: - Product catalog with Stripe integration - Service areas and parts pages - Admin dashboard with Clerk authentication - SEO optimized pages with JSON-LD structured data Co-authored-by: Cursor <cursoragent@cursor.com>
25 lines
668 B
Text
25 lines
668 B
Text
export default function variance(values, valueof) {
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let count = 0;
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let delta;
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let mean = 0;
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let sum = 0;
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if (valueof === undefined) {
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for (let value of values) {
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if (value != null && (value = +value) >= value) {
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delta = value - mean;
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mean += delta / ++count;
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sum += delta * (value - mean);
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}
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}
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} else {
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let index = -1;
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for (let value of values) {
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if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
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delta = value - mean;
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mean += delta / ++count;
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sum += delta * (value - mean);
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}
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}
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}
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if (count > 1) return sum / (count - 1);
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}
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