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1 /* This Source Code Form is subject to the terms of the Mozilla Public |
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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4 |
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5 /*global intl_NumberFormat: false, */ |
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6 |
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7 |
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8 var numberFormatCache = new Record(); |
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9 |
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10 |
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11 /** |
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12 * Format this Number object into a string, using the locale and formatting options |
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13 * provided. |
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14 * |
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15 * Spec: ECMAScript Language Specification, 5.1 edition, 15.7.4.3. |
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16 * Spec: ECMAScript Internationalization API Specification, 13.2.1. |
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17 */ |
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18 function Number_toLocaleString() { |
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19 // Steps 1-2. Note that valueOf enforces "this Number value" restrictions. |
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20 var x = callFunction(std_Number_valueOf, this); |
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21 |
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22 // Steps 2-3. |
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23 var locales = arguments.length > 0 ? arguments[0] : undefined; |
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24 var options = arguments.length > 1 ? arguments[1] : undefined; |
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25 |
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26 // Step 4. |
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27 var numberFormat; |
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28 if (locales === undefined && options === undefined) { |
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29 // This cache only optimizes for the old ES5 toLocaleString without |
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30 // locales and options. |
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31 if (numberFormatCache.numberFormat === undefined) |
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32 numberFormatCache.numberFormat = intl_NumberFormat(locales, options); |
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33 numberFormat = numberFormatCache.numberFormat; |
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34 } else { |
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35 numberFormat = intl_NumberFormat(locales, options); |
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36 } |
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37 |
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38 // Step 5. |
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39 return intl_FormatNumber(numberFormat, x); |
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40 } |