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Editor to share with you how to use displacement operation in js to make the execution more efficient, I believe most people do not know much about it, so share this article for your reference. I hope you will gain a lot after reading this article. Let's learn about it together.

Displacement operation to determine whether a number is odd or even

In addition to the traditional way of finding the remainder%, you can also use a number and 1 for bitwise-operation judgment, as follows

Functionassert (n) {

If (nasty 1) {

Console.log ("n is odd")

} else {

Console.log ("n is even")

}

}

Displacement operator rounding

/ / XOR rounding:: bitwise operation is only valid for integers. When a decimal is encountered, the decimal part is rounded off, leaving only the integer part. Therefore, the OR operation of a decimal with 0 is equivalent to removing the decimal part of the number, that is, taking integer digits.

12.9 ^ 0 / / 12

-12.9 ^ 0 / /-12

/ / rounding of a pair of negative positioning operators

~ ~ 4.9 Compact 4

~ (- 4.9) / /-4

/ / moving 0 bits to the left is equivalent to converting the value to a 32-bit integer, which is equivalent to rounding, and is valid for both positive and negative numbers.

13.58&0xff

B=hex&0xff

Return "rgb (" + r + "," + g + "," + b + ")"

}

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