It looks a bit bulky, I’d recommend you to rewrite it in the following way: SELECT User1.NAME,User1.PORT,User1.IP,File1.SIZE, FROM [User_File],[User1],[File1] WHERE [User_File].UID= User1.UID AND [User_File].FID=File1.FID and [User_File].FID = {0} and check if it runs without errors from your SQL Management Studio. solved What’s the problems on this sql command code? [closed]
Introduction This question is about a SQL command code and the problems associated with it. SQL is a powerful language used to query and manipulate data in databases. It is important to understand the syntax and structure of SQL commands in order to ensure that the code is written correctly and that the desired results … Read more
Files act like a long tape in a casette; you can read the file but by the time you are done you have passed the tape all the way to the end. Reading again won’t give you the data again. As such your second function tried to read data from a file that is already … Read more
Queues are most commonly used for scheduling and request handling applications. For example, anything where you have one process creating requests and another process handling the requests you would use a queue to hold the requests. Normally a queue is in FIFO order – requests are processed in the order they are received, but they … Read more
As Mark Baker pointed out, you’ll need to use something like Dijkstra’s algorithm to traverse a weighted graph (which is what you’ll have when you include distances). Here’s a simple distance function I found here: <?php /*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/ /*:: :*/ /*:: This routine calculates the distance between two points (given the :*/ /*:: latitude/longitude of those … Read more
It is hard to tell, but it looks like Python 3 is in use, and I suspect the book is requiring Python 2. If you can re-run the program with Python 2, you may find you have far fewer errors (if any). If you do have a new error, you can then ask a new … Read more
strtok is working exactly as expected. It breaks the input apart into the strings 123 and 456. strtok (tempRead, ” “); /* Returns 123 */ strtok (NULL, ” “); /* Returns 456 */ I think you can do with a simpler solution: int i = 0; char tempRead[30]; … while (tempRead[i] == ‘ ‘ && … Read more
Casting to integer (Int32) drops the fractional part of your number… int number = (Int32) 3.14159; // value of number will be 3 (not 3.14159) // Do this instead double c = Math.Sqrt(c2); // will give you the result you want output.Text = Convert.ToString(c); solved C# – Math.Sqrt() returning decimals
You could use an object like this. var obj = {}; var name=”jayesh”; obj[name] = ‘some value’; var myvalue = obj.jayesh; You can create a global variable like this: var name=”jayesh”; window[name] = ‘some value’; You can also use eval but this can cause security issues so use with caution! var name=”jayesh”; var evalString = … Read more
You select by element type with a certain prop $(‘label[for=”ProductSelect-option-0″]’).text(‘Choose Color’); <script src=”https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js”></script> <label for=”ProductSelect-option-0″>Color</label> 1 solved How to change label value using jQuery, without selecting by class or ID?
From your expected result, it appears that each “group” is based on contiguous id values. For this, you can use the compare-cumsum-groupby pattern, and then use agg to get the min and max values. # Sample data. df = pd.DataFrame( {‘id’: [1, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, … Read more
A possible solution: library(lubridate) # example time data time = c( “2015-10-05 15:44:41.986797”, “2015-10-05 15:59:23.389583”, “2015-10-05 16:59:44.99402”, “2015-10-05 16:59:44.99402”, “2015-10-05 16:59:44.99402”, “2015-10-05 16:59:44.99402”, “2015-10-05 17:59:59.594524”, “2015-10-05 17:59:59.594524”, “2015-10-05 18:00:05.555564” ) # transform time strings to POSIXct objects for count time <- ymd_hms(time) # count by second event <- data.frame(table(time)) # transform time factors to POSIXct … Read more
/* !important are just used to overide the bootstrap css in the snippet */ .alertContainer { border-radius: 0 !important; border-width: 0 !important; padding: 0 !important; height: auto !important; position: absolute !important; bottom: 15px !important; left: 0; right: 0; margin: 0 auto !important; width: 480px !important; display: table; } .leftPart { text-align: center; width: 55px; font-size: … Read more
Note that conv2(double(im(:,:,q)),mask,’same’)./sz^2 is the same as conv2(double(im(:,:,q)),mask./sz^2,’same’) This is because the convolution and the multiplication commute. Thus, the convolution operation computes a local mean. Without the division, it would be a local sum. 0 solved Why is the output of `conv2()` is divided by `sz^2`?
Yes, it does benefit the GC to set the properties to null. Doing so removes the references from the element (that is contained in the DOM) to the handler function, and given that it probably is the only reference to the function it makes the function eligible for collection. However, unless the function is a … Read more