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yardfarmer/gist:ef09cc36daab258729f0

Created September 14, 2014 07:52
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gistfile1.txt
// '+' 运算符的结合性
当加号运算符和字符串和数字一起使用时，需要考虑加号的结合性的对运算顺序的影响。也就是说，运算结果是依赖于运算符的运算顺序的。
1+2+"3" => 33
"1"+2+"3" => "123"
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