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| 1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 39 var minusZero = 1 / (-1 / 0); | 39 var minusZero = 1 / (-1 / 0); |
| 40 function isMinusZero(x) { | 40 function isMinusZero(x) { |
| 41 return x === 0 && 1 / x < 0; | 41 return x === 0 && 1 / x < 0; |
| 42 } | 42 } |
| 43 | 43 |
| 44 assertTrue(!isMinusZero(0)); | 44 assertTrue(!isMinusZero(0)); |
| 45 assertTrue(isMinusZero(minusZero)); | 45 assertTrue(isMinusZero(minusZero)); |
| 46 assertEquals(0, Math.abs(minusZero)); | 46 assertEquals(0, Math.abs(minusZero)); |
| 47 assertTrue(!isMinusZero(Math.abs(minusZero))); | 47 assertTrue(!isMinusZero(Math.abs(minusZero))); |
| 48 assertTrue(!isMinusZero(Math.abs(0.0))); | 48 assertTrue(!isMinusZero(Math.abs(0.0))); |
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