binary

问题 In my table I have two columns, Data and Range . Range field is encoded binary from ArcGIS. this format is supposed to be a standard format with in the Geo spatial industry. https://www.gaia-gis.it/gaia-sins/BLOB-Geometry.html http://www.geopackage.org/spec120/#gpb_format need to use the srs_id to decode the Range field. String sql = "SELECT DATA, RANGE FROM IK_TEMP"; try (Connection conn = this.connect(); Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery(sql)){ //

问题 I am wanting to make a program that take a binary string and turns it into a decimal string. I know you how do this: Convert.ToString(00001000, 2); To convert a single binary number to a single decimal number, but how would I take a bunch of binary numbers in a string, like this: 00001000 00000101 00001100 00001100 00001111 00010111 00001111 00010010 00001100 00000100 into a string of decimal numbers, like this: 8 5 12 12 15 23 15 18 12 4 Thank for the help. 回答1: Its as easy as Convert

问题 There's something that I don't get with the binary search code on C. int binarySearch(int a[], int n, int x) { int low=0, mid, high=n-1; while(low <= high) { mid = (low + high) / 2; if (x < a[mid]) high = mid - 1; else if (x > a[mid]) low = mid + 1; else return mid; } return -1; } Why does the while loop while(left<=right) can't be written: while(left<right) ? Will this change effect things? 回答1: Take a simple case of int a[1] = {5}; printf("%d\n", binarySearch(a, 1, 5)); With while(low <

问题 On SQL Server 2017 I have a base 10 number of type DECIMAL(38,0) which I need to convert to its base 2 representation. This works fine for smaller numbers, but fails with the target order of magnitude: DECLARE @var1 DECIMAL(38, 0) = 2679226456636072036565806253187530752; WITH A AS (SELECT @var1 AS NUMBER, CAST('' AS VARCHAR(125)) AS BITS UNION ALL SELECT CAST(ROUND(NUMBER / 2, 0, 1) AS DECIMAL(38, 0)), CAST(BITS + CAST(NUMBER % 2 AS VARCHAR(125)) AS VARCHAR(125)) FROM A WHERE NUMBER > 0)

问题 I want to make a realtime application, which involves finding the edges of a binary mask. I need something fast, without GPU if possible, that runs hopefully below 0.0005 secs per image, with size (1000,1000). I will be using the following example of a binary image ,with size (1000,1000). (Code to replicate:) import numpy as np im=np.zeros((1000,1000),dtype=np.uint8) im[400:600,400:600]=255 Image The first logical way to do things fast was to use the OpenCV library: import cv2 timeit.timeit

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last month . I want to merge two characters and print them via a single variable by using ASCII (refer to the image below): [1]: https://i.stack.imgur.com/TWodP.jpg 回答1: try this if your machine is little endian unsigned int C = (b << 8) | a; printf("%s",&C); otherwise if your machine is big endian try unsigned

问题 i want to make a program like the following picture and this is my code <?php $iv = 0; $Kunci = "U"; $key = dechex(ord($Kunci)); $k = sprintf("%08d",decbin(hexdec($key))); $c0 = sprintf("%08d", decbin($iv)); $Cip= "0C52CCD7EDB3"; $Cbs = array(); $Cbs[0]= $c0; $Plaintext = array(); $Cas = array(); $P = array(); $m= 1; $n=1; //$Cbs= $Csplit = str_split($Cip, 2); $Cas= str_split($Cip,2); for ($i=0; $i<count($Csplit); $i++) { $Cbs[$m] = sprintf("%08d",decbin(hexdec($Csplit[$i]))); $m++; } for($i

问题 I don't understand why SELECT UUID(); Returns something like: 3f06af63-a93c-11e4-9797-00505690773f But if I insert it into a binary(16) field (the UUID() function) with for instance a BEFORE INSERT trigger and run a select, it returns something like: 0782ef48-a439-11 Note that these two UUIDs are not the same data. I realize binary and an UUID string doesn't look identical, but shouldn't the selected data at least be just as long? Otherwise how can it possibly be equally likely to be unique?

问题 I don't understand why SELECT UUID(); Returns something like: 3f06af63-a93c-11e4-9797-00505690773f But if I insert it into a binary(16) field (the UUID() function) with for instance a BEFORE INSERT trigger and run a select, it returns something like: 0782ef48-a439-11 Note that these two UUIDs are not the same data. I realize binary and an UUID string doesn't look identical, but shouldn't the selected data at least be just as long? Otherwise how can it possibly be equally likely to be unique?

问题 This is most probably the dumbest question anyone would ask, but regardless I hope I will find a clear answer for this. My question is - How is an integer stored in computer memory? In c# an integer is of size 32 bit. MSDN says we can store numbers from -2,147,483,648 to 2,147,483,647 inside an integer variable. As per my understanding a bit can store only 2 values i.e 0 & 1. If I can store only 0 or 1 in a bit, how will I be able to store numbers 2 to 9 inside a bit? More precisely, say I