Created
June 29, 2014 16:40
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'hoge'.charAt(n) と 'hoge'[n] の違い。
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| 'hoge'.charAt(3); // => 'e' | |
| 'hoge'[3]; // => 'e' | |
| 'hoge'.charAt(4); // => '' | |
| 'hoge'[4]; // => undefined |
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