javascript - js large number to binary

There is a very large string of decimal numbers. How to convert it into a binary string? Since the number is very large, there is no way to convert it into a number and put it in the variable toString(2)

仅有的幸福 2017-05-19 10:14:41 0  6  728

stl - c/c++ Questions about binary operations (by the way, looking for good libraries and methods)

I am currently working on a project involving content compression, which requires the data to be processed in a binary format (such as LZ77 compression, Huffman coding, etc.), which involves a lot of functions and functions. But when I did it myself, I found that although C++ provides a relatively c...

天蓬老师 2017-06-05 11:11:09 0  2  835

How to automatically arrange game personnel

I would like to ask you a database question. A class of students has a chess and card game. The table is fixed and the game is divided into three rounds. The winner in the first round gets 2 points, and the loser gets no points. In the second round, the opponent and the table are automatically assig...

移动用户-8685055 2019-04-27 18:54:58 0  1  1047

javascript - Function to count the number of words?

Numbers, letters, and space symbols represent one digit, and Chinese characters represent two digits. How to write a function to calculate the number of digits?

阿神 2017-05-19 10:13:45 0  2  845

Update href and download file on button click.

I'm trying to download a file on click of a button. My specific method is as follows: call an API on button click, which returns the binary data of the file. Convert the binary data to a base64 URL and update the element's href attribute to this base64 URL. Call the element's click method inside the...

P粉170438285 2023-07-20 15:17:03 0  1  546

"Converting JavaScript Variables to PHP: JavasScript variables converted to PHP"

So I'm wondering if there is a way to pass Javascript variables into PHP. I'm making a script that gets a location from a website and inserts this location into MySQL to get some analytics data. This is my Javascript function: functiongetPosition(position){constlatitude=position.coords.latitude;cons...

P粉904405941 2023-09-18 11:50:08 0  1  502

redis的setbit和getbit是干嘛的？？？

这是我看到的对redisgetbit的讲解，感觉讲的很到位，可是就是一个也不懂：不明白这个计算公式，还有，获取偏移量上的二进制位的值有什么用呢？ GETBIT 命令用于返回位数组 bitarray 在 offset 偏移量上的二进制位...

天蓬老师 2017-04-27 09:03:36 0  0  880

What are arrays and two-dimensional arrays in php?

What are arrays and two-dimensional arrays in php? I understand now that an eheo is so sad! I thought I still couldn’t tell the difference between arrays and two-digit arrays! I beg the teacher to give me some pointers. Thank you.

Administrator(长风大侠) 2020-05-29 15:13:00 0  2  1210

求解mongodb mapreduce 遍历values的问题。

在mongodb mapreduce的reduce函数中，参数values是一个数组，可以用values.forEach进行遍历。 {代码...} 但是values比较大时，values会被会被拆分存储，在原本Reduce函数中的forEach只遍历了第一层的数据，无法遍...

ringa_lee 2017-04-28 09:06:06 0  1  642

php array rotation

Of these two integer arrays, how do I determine if the second array is a rotated version of the first array and which php function is required? Example: Original array A=[1,2,3,4,5,6,7,8] Rotated array B=[6,7,8,1,2,3,4,5] In this example, the array All numbers of A are rotated 5 places to the right.

P粉043295337 2023-09-03 14:08:19 0  1  603

Problems encountered when using strpos() PHP function for information retrieval and cropping

I'm getting raw data from an API that contains a JSON and I'm trying to crop out the JSON-only part from the returned data. I used PHP's strpos() function to write a function to trim the JSON from the beginning (the position of the opening brace) to the end (the position of the closing brace). But I...

P粉692052513 2023-09-21 10:35:25 0  1  674

javascript - WeChat applet encapsulation and positioning issues (encapsulation is asynchronous and may require multiple requests)

There is no problem when you click the cancel button when the positioning is successful for the first time or the positioning fails. You can receive the callback in then or cancel the function in the positioning catch. However, if the positioning fails and clicks repositioning to re-call getLocation...

巴扎黑 2017-06-26 10:57:02 0  1  797

The execution order of the dividing line

Shouldn’t the code in the function body also be executed in order? Why is the dividing line executed first in the second brother foreach, and executed twice?

Lost 2018-03-21 15:03:45 0  5  1263

javascript onclick

I encountered such a problem when writing JS today: {code...} The above is my JS code part. Pay attention here, the second sentence in the init function, btn.onclick = btnHandle(); My original intention is to click button, execute the btnHandle function, but the actual situation is that after refres...

世界只因有你 2017-05-19 10:20:56 0  3  606

javascript-canvas drawing

I wrote a function that calls canvas's drawImage for the first time to draw part of a local picture (it can succeed), and then calls toDataURL to convert the picture drawn by canvas into the src attribute of the image object, and then this Why does the picture drawn on canvas call the same method fo...

PHP中文网 2017-07-05 10:46:27 0  1  771

objective-c - iOS 关于上传word文档问题

上传word文档文件,和上传txt,图片等基本上一样吗,需要转换成二进制吗,会不会有什么问题呢.后台会不会出现不能解析?

阿神 2017-05-02 09:22:21 0  1  510

mongodb - mongo如何实现mysql类似的嵌套查询。

目前在做一个mongodb的数据分析项目统计分析的功能 说明： （1）基础统计数据是不定时统计的； （2）查询展示的周期固定为（小时，天，月，年）等； （3）相对应的数据要按照对应的字段做以group by对应的字段做 ...

PHP中文网 2017-04-24 09:13:50 0  3  531

javascript - How does js handle data with low-end first and high-end last?

For example, during the interaction with the hardware device, a hexadecimal number is received from the hardware, with the low digit in front and the high digit in the back. How to elegantly parse it into the correct decimal data {code...} Currently The processing method: cut num according to length...

滿天的星座 2017-05-19 10:31:47 0  1  590

python - pymysql reports error 1146 The xls table failed to import into the database. I don't know where the problem lies.

Python 4.3.0 defines a class to operate the local database, and then defines two functions to import the corresponding two tables. The strange thing is that the first function input_HA() can be used and the form is imported successfully, but the second input_ImpactList() does not work. Can anyone he...

漂亮男人 2017-05-18 10:55:11 0  1  1235

javascript - The information received by WebSocket is binary. How to parse it?

I grabbed other people's ws information and got Blob type data. How should I parse it?

天蓬老师 2017-05-16 13:44:39 0  1  963