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February 2, 2017 12:16
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| function f() { | |
| return v; | |
| var v; | |
| } | |
| function g() { | |
| if (false) { var v } | |
| return v; | |
| } | |
| function h() { | |
| var v = v + 1; | |
| return v; | |
| } | |
| println(f()) | |
| println(g()) | |
| println(h()) | |
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Big Sky :: Ruby の a = a + 1 はなぜ undefined method '+' for nil:NilClass なのか