在这个问答内容中,我们要讨论的是JavaScript中的位移操作(bitshift)和替代math.round的方法。 首先,位移操作是一种在数字的二进制表示中移动位的操作。在JavaScript中,位移操作有两种: 左移(left shift):使用<<操作符,将二进制数向左移动指定的位数。
Bit operators work on 32 bits numbers. OperatorDescriptionExampleSame asResultDecimal &AND5 & 10101 & 000100011 |OR5 | 10101 | 000101015 ~NOT~ 5~0101101010 ^XOR5 ^ 10101 ^ 000101004 <<left shift5 << 10101 << 1101010 >>right shift5 >> 10101 >> 100102 ...
Operator Usage Description Bitwise AND a & b Returns a one in each bit position for which the corresponding bits of both operands are ones. Bitwise OR a | b Returns a one in each bit position for which the corresponding bits of either or both operands are ones. Bitwise XOR a ^ b Retur...
8) 逗号运算符(Comma operator [ˈkɑ:mə]) 9) 一元运算符(Unary operators [ˈju:nəri]) 10) 关系运算符(Relational operator [rɪ'leɪʃənl]) 1. 赋值运算符(Assignment operators) 一个赋值运算符将它右边操作数的值赋给它左边的操作数。 最简单的赋值运算符是等于(=),它将右边的...
One bit left shift in JavaScript For example, let a = 8; let b = 1; result = a << b; // 1 ( 00000000000000000000000000010000 ) console.log(result); Run Code JavaScript Sign-propagating right shift In the right shift operator >>, the first operand specifies the number and the secon...
OperatorNameDescription &ANDSets each bit to 1 if both bits are 1 |ORSets each bit to 1 if one of two bits is 1 ^XORSets each bit to 1 if only one of two bits is 1 ~NOTInverts all the bits <<Zero fill left shiftShifts left by pushing zeros in from the right and let the ...
>>> (Zero-fill right shift) This operator shifts the first operand the specified number of bits to the right. Excess bits shifted off to the right are discarded. Zero bits are shifted in from the left. The sign bit becomes 0, so the result is always non-negative. ...
运算符是处理数据的基本方法,用来从现有的值得到新的值。JavaScript 提供了多种运算符,覆盖了所有主要的运算。 概述 JavaScript 共提供10个算术运算符,用来完成基本的算术运算。 加法运算符:x + y 减法运算符:x - y 乘法运算符:x * y 除法运算符:x / y ...
Bitwise operators perform an operation on the bitwise (0,1) representation of their arguments, rather than as decimal, hexadecimal, or octal numbers. For example, the decimal number eight has a binary representation of 1000. Bitwise operators do their operations on such binary representation (for ...
0:001> dx @$myScript.comparisonWith64BitValues(9007199254740990, 9007199254740990) areEqual >> true areNotEqual >> false isEqualTo42 >> false isLess >> false We will also try the number 42 as the first value to validate the comparison operator is working as it should. ...