12 lines
267 B
JavaScript
12 lines
267 B
JavaScript
const join = (arr, separator = ',', end = separator) =>
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arr.reduce(
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(acc, val, i) =>
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i === arr.length - 2
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? acc + val + end
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: i === arr.length - 1
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? acc + val
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: acc + val + separator,
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''
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);
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module.exports = join;
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