1 | var isSymbol = require('./isSymbol');
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10 |
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11 | function compareAscending(value, other) {
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12 | if (value !== other) {
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13 | var valIsDefined = value !== undefined,
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14 | valIsNull = value === null,
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15 | valIsReflexive = value === value,
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16 | valIsSymbol = isSymbol(value);
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17 |
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18 | var othIsDefined = other !== undefined,
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19 | othIsNull = other === null,
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20 | othIsReflexive = other === other,
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21 | othIsSymbol = isSymbol(other);
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22 |
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23 | if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
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24 | (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
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25 | (valIsNull && othIsDefined && othIsReflexive) ||
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26 | (!valIsDefined && othIsReflexive) ||
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27 | !valIsReflexive) {
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28 | return 1;
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29 | }
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30 | if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
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31 | (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
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32 | (othIsNull && valIsDefined && valIsReflexive) ||
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33 | (!othIsDefined && valIsReflexive) ||
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34 | !othIsReflexive) {
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35 | return -1;
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36 | }
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37 | }
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38 | return 0;
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39 | }
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40 |
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41 | module.exports = compareAscending;
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