Use join instead of reduce
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@ -1,5 +1,5 @@
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export function concat(xs: string[]): string {
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export function concat(xs: string[]): string {
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return xs.reduce((a, b) => a + b, '');
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return xs.join('');
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}
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}
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export function capitalize(s: string): string {
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export function capitalize(s: string): string {
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