| 1 | export default function(grouping, thousands) {
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| 2 | return function(value, width) {
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| 3 | var i = value.length,
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| 4 | t = [],
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| 5 | j = 0,
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| 6 | g = grouping[0],
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| 7 | length = 0;
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| 8 |
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| 9 | while (i > 0 && g > 0) {
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| 10 | if (length + g + 1 > width) g = Math.max(1, width - length);
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| 11 | t.push(value.substring(i -= g, i + g));
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| 12 | if ((length += g + 1) > width) break;
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| 13 | g = grouping[j = (j + 1) % grouping.length];
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| 14 | }
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| 15 |
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| 16 | return t.reverse().join(thousands);
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| 17 | };
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| 18 | }
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