考虑以下code:
var combined:Number = Number(4294967296) | Number(2403025069);
var testLimit:Number = 6697992365;
trace("Combined is:", combined, "should be", testLimit);
输出是:
组合是:-1891942227应该是6697992365
Combined is: -1891942227 should be 6697992365
为什么?我以为号码数据类型可以容纳64位整数(okay-真正52位的,但上面的数字是隔靴搔痒的限制)
Why?! I thought Number datatypes can hold 64 bit integers (okay- really 52-bit, but the numbers above are nowhere near that limit)
从的文档:
|
位或运算符
转换EX pression1和EX pression2为32位无符号整数的,并且在每个位的位置放置一个1,其中的任前pression1或前的对应位pression2为1。
Converts expression1 and expression2 to 32-bit unsigned integers, and places a 1 in each bit position where the corresponding bits of either expression1 or expression2 are 1.
...
结果是PTED为32位二进制补码数间$ P $,所以的的结果是一个整数的范围为-2147483648到2147483647。
The result is interpreted as a 32-bit two's complement number, so the result is an integer in the range -2147483648 to 2147483647.