javascript shift bit
跳到 Bitwise shift operators - The bitwise shift operators take two operands: the first is a quantity to be shifted, and the second specifies the number of bit positions by which the first operand is to be shifted. The direction of the shift operation is c, 按位操作符(Bitwise operators) 将其操作数(operands)当作32位的比特序列(由0和1组成),而不是十进制、十六进制或八进制数值。例如 ... 则为1001。按位操作符操作数字的二进制形式,但是返回值依然是标准的JavaScript数值。 ... 左移(Left shift), a << b, 将 a 的二进制形式向左移 b (< 32) 比特位,右边用0填充。,跳到 Bitwise shift operators - The bitwise shift operators take two operands: the first is a quantity to be shifted, and the second specifies the number of bit positions by which the first operand is to be shifted. The direction of the shift operation is c,跳到 Bitwise shift operators - The bitwise shift operators take two operands: the first is a quantity to be shifted, and the second specifies the number of bit positions by which the first operand is to be shifted. The direction of the shift operation is c,Operator, Name, Description. &, AND, Sets each bit to 1 if both bits are 1. |, OR, Sets each bit to 1 if one of two bits is 1. ^, XOR, Sets each bit to 1 if only one of two bits is 1. ~, NOT, Inverts all the bits. <<, Zero fill left shift, Shift,若要檢視英文版的文章,請選取[原文] 核取方塊。您也可以將滑鼠指標移到文字上,即可在快顯視窗顯示英文原文。 譯文. 原文. 本文件已封存並已停止維護。 位元左移運算子(<<) (JavaScript). 將運算式的位元向左移位。 語法. 複製. result = expression1 << expression2. 參數. result. 任何變數。 expression1. 任何運算式。 expression2. , result = expression1 << expression2. 參數Parameters. 結果result 任何變數。Any variable. expression1expression1 任何運算式。Any expression. expression2expression2 任何運算式。Any expression. 備註Remarks. << 運算子移位的位元expression1中指定的位元數字向左expression2。The << opera, The sign bit of expression1 is used to fill the digits from the left. Digits shifted off the right are discarded. For example, after the following code is evaluated, temp has a value of -4: -14 (11110010 in two's complement binary) shifted right two , Do you see any drawbacks using "multiplication" instead of "bit-shift"? It still is kind of slower, but you should really avoid working directly with very large numbers in JavaScript most of the time anyway. There are libraries that d, Yes. Java has bit-wise operators and shift operators. Is there something in particular you wish to ask? edit: Ah, just cast to an int before shifting. int zz = ((int) 123456789123L) << 20;. You will get -1473249280 just as you note the JavaScript g
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javascript shift bit 相關參考資料
Bitwise operators - JavaScript | MDN
跳到 Bitwise shift operators - The bitwise shift operators take two operands: the first is a quantity to be shifted, and the second specifies the number of bit positions by which the first operand is t... https://developer.mozilla.org 按位操作符- JavaScript | MDN
按位操作符(Bitwise operators) 将其操作数(operands)当作32位的比特序列(由0和1组成),而不是十进制、十六进制或八进制数值。例如 ... 则为1001。按位操作符操作数字的二进制形式,但是返回值依然是标准的JavaScript数值。 ... 左移(Left shift), a << b, 将 a 的二进制形式向左移 b (< 32) 比特位,右边用... https://developer.mozilla.org Bitwise Operators - JavaScript - MDN - Mozilla
跳到 Bitwise shift operators - The bitwise shift operators take two operands: the first is a quantity to be shifted, and the second specifies the number of bit positions by which the first operand is t... https://developer.mozilla.org Bitwise Operatoren - JavaScript | MDN
跳到 Bitwise shift operators - The bitwise shift operators take two operands: the first is a quantity to be shifted, and the second specifies the number of bit positions by which the first operand is t... https://developer.mozilla.org JavaScript Bitwise - W3Schools
Operator, Name, Description. &, AND, Sets each bit to 1 if both bits are 1. |, OR, Sets each bit to 1 if one of two bits is 1. ^, XOR, Sets each bit to 1 if only one of two bits is 1. ~, NOT, Inve... https://www.w3schools.com 位元左移運算子(<<) (JavaScript) - MSDN - Microsoft
若要檢視英文版的文章,請選取[原文] 核取方塊。您也可以將滑鼠指標移到文字上,即可在快顯視窗顯示英文原文。 譯文. 原文. 本文件已封存並已停止維護。 位元左移運算子(<<) (JavaScript). 將運算式的位元向左移位。 語法. 複製. result = expression1 << expression2. 參數. result. 任何變數。 expression... https://msdn.microsoft.com 位元左移運算子(<<) (JavaScript) | Microsoft Docs
result = expression1 << expression2. 參數Parameters. 結果result 任何變數。Any variable. expression1expression1 任何運算式。Any expression. expression2expression2 任何運算式。Any expression. 備註Remarks. << 運算子移... https://docs.microsoft.com Bitwise Right Shift Operator (>>) (JavaScript) | Microsoft Docs
The sign bit of expression1 is used to fill the digits from the left. Digits shifted off the right are discarded. For example, after the following code is evaluated, temp has a value of -4: -14 (1111... https://docs.microsoft.com javascript - bit shift vs multiplication - Stack Overflow
Do you see any drawbacks using "multiplication" instead of "bit-shift"? It still is kind of slower, but you should really avoid working directly with very large numbers in JavaScr... https://stackoverflow.com how to replicate javascript bit-shift, bit-wise operations in java ...
Yes. Java has bit-wise operators and shift operators. Is there something in particular you wish to ask? edit: Ah, just cast to an int before shifting. int zz = ((int) 123456789123L) << 20;. You... https://stackoverflow.com |