I"ve seen it in an outsourced project before, but I don"t know how to write it. I"m a little curious.
is inside >, ^, what does 0xff mean?
I"ve seen it in an outsourced project before, but I don"t know how to write it. I"m a little curious.
is inside >, ^, what does 0xff mean?
^ is the bit operator XOR . This is the calculation of CRC32 CAPTCHA, which really requires bit operations.
its truth table is
A ^ B OUT
1 0 1
0 1 1
0 0 0
1 1 0 Note that it is bitwise, and only if the corresponding bit matches the above truth table, the corresponding bit is set.
for example, for A=0XF , that is, binary numbers (1111) , B=0XA that is, binary numbers (1010)
Centra ^ B , then C=0x5 that is, binary numbers (0101)
is an unsigned right shift operation, which moves the symbol bits together, and the high position complement 0
'>'is the displacement operator of js (unsigned):
1:
10>>>1
10 1010
0101
5'^'is the js interior operation XOR XOR
the processing is as follows:
(1) True ^ false = True
(2) false ^ True = True
(3) false ^ false = false
(4) True ^ True = false
2:
10001
30011
xor00102
'0xFF' is the hexadecimal representation of the computerThe
bit operator, which operates at the bottom of the number (that is, the 32 digits that represent the number).
^ operator then looks at the values in the binary representation of the two expressions and performs a bitwise XOR operation. If and only if a bit of one expression is 1, the bit in the result is 1. Otherwise, the bit in the result is 0.
var result = expression1 ^ expression2;
1001 = 0101 1100
'move to the right unsigned, ignore the symbolic bits, and the spaces are filled with 0
& perform a bitwise "and" operation on each bit of the two 32-bit expressions. If both bits are 1, the result is 1. Otherwise, the result is 0.
bit operator, you haven't seen elevation 3 at a glance.
can you tell me about the vscode theme of the landlord? I can't find a light color theme with such a good color match. Thank you
Previous: The element radio box becomes a multi-selection problem.
Next: Safari does not load the js file and there is no JS script in the resource list.
The horizontal coordinates of echarts are not specifically marked, and the X coordinates do not have a grid to indicate. Here is a figure that specifies . js * * createChartSix() { this.$http .get(this.$api.dataChart) .then(rsp => { ...
sincerely ask for advice: < hr > I want to use node as the background to build a video streaming server. The front end is similar to Youku VOD. It can record the playback node function, and load the progress bar at any point (starting from the c...
I need to implement in a chained promise function, any function error in the middle terminates the program, and can catch the error function, and then perform different operations according to different error functions. How can the following code be imp...
I would like to ask what is wrong with this code. Thank you for your answers. ...
is doing a question on Niuke.com. I encounter a problem: to achieve the function callIt, after the call meets the following conditions 1, the returned result is the result after calling fn 2, and the call parameter of fn is all the parameters after th...
A timing examination system is triggered if the click event is triggered within 5 seconds, and if it is not triggered, the system marks the correct answer at the end of the countdown. How to implement ...
description: a regular match is given to the content of an input box, and the matching content is the product activation code. looks like this: "0C31-0B81-BB32-3094-0C31-0B81-BB32-3094 " Code: $( -sharplicenseCode ).keyup(function () { le...
1. The custom event triggers the click event of .cpcstartrefresh, but triggers 2 click events each time 2. The code is as follows: window.onmessage = function (e) { create an event object, var myEvent = document.createEvent( Event ); m...
I configured the MIME type of the file with the amr suffix in the apache configuration as application ms-download, Why it is a garbled page when opening a file in amr format using window.open in chrome, while a file in amr format can be successfully dow...
I got a set of data, which is to choose the type of question. How can I tell if I have chosen the right one answera: "Olympic Games " answerb: "Asian Games " answerc: "Paralympic Games " answerd: "University Games " id: "1772 " question: "f...
read a number, such as 521 change this number to 0521 but put it into four div separately, how to realize it? 0 < div > 5 < div > 2 < div > 1 < div > ...
react projects cannot save store? using redux, data index.js ReactDOM.render( <Provider store={store}> <Router > < Provider>, document.getElementById( root )) registerServiceWorker() actions export const SET_USER = ...
how to find all the NA characters in a HMLT page and replace it with "and invalid " with native JS ...
...
suppose there are only a.js and b.js (only two js and nothing else) b.js export A variable is used for a.js can you directly use import and export without using packaging and compilation tools such as webpack or babel can it be achieved with the h...
do the gods have plug-ins for uploading attachments in the mobile version that can also be uploaded more than one? ...
what does the code circled in the following picture mean? ...
I look at a html ui project with items such as: var apiserver = window[ apiserver ]; url = apiserver + "filterUrlController getUrlData"; I searched the whole project and couldn t find the value of window [ apiserver ]. How do you un...
In the vue-cli project, I directly introduced the particls library into index.html, and the related files are placed in the static directory . <div id="particles-js">< div> <script type="text javascript" src="s...
How does the code return only the result after the last asynchronous operation in the for loop is completed as shown in the figure? Please stop by and give me a hand. ...