回答編集履歴
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「負の数」を「正の数」に変換しない
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ビット演算子は内部的に **ToInt32** を使用していますが、「負の数」を「正の数」に変換しません(ToInt32 と動作が異なります)。
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```JavaScript
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console.log(-1.372 | 0); // -1
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~~
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console.log(~~-1.372); // -1
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```
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12.12.3 Runtime Semantics: Evaluation
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- [12.12 Binary Bitwise Operators - ECMAScript® 2017 Language Specification](http://www.ecma-international.org/ecma-262/8.0/#sec-binary-bitwise-operators)
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- [1
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- [12.12.3 Runtime Semantics: Evaluation - ECMAScript® 2017 Language Specification](http://www.ecma-international.org/ecma-262/8.0/#sec-binary-bitwise-operators-runtime-semantics-evaluation)
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