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20 lines
374 B
20 lines
374 B
export default function(values, valueof) { |
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var n = values.length, |
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i = -1, |
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value, |
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sum = 0; |
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|
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if (valueof == null) { |
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while (++i < n) { |
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if (value = +values[i]) sum += value; // Note: zero and null are equivalent. |
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} |
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} |
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else { |
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while (++i < n) { |
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if (value = +valueof(values[i], i, values)) sum += value; |
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} |
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} |
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return sum; |
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}
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