append

问题 Currently I have a loop that updates the DOM in each iteration; I have learned this is a bad practice & you should update the DOM as little as possible for better speed. So I was wondering how I go about editing the below so I can store all the elements in one element or something & then do a single DOM addition once the loop ends. Here is the loop.. for (var i = spot; i < spot + batchSize && i < cats.options.length; i++) { // Check if the cat is selected if (cats.options[i].selected == true)

问题 If each array has the shape (1000, 2, 100), it is easy to use con = np.concatenate((array_A, array_B)) to concatenate them, thus con has the shape (2000, 2, 100). I want to dynamically append or concatenate "con" in a function. The step is described as following: First, read data from the first file and process data to generate an array. Secondly, read date from the second file and append generated array into the first array .... def arrayappend(): for i in range(n): #read data from file_0 to

问题 It seems like it's only possible to use a pass-through query to retrieve data from your SQL Server tables and into MS Access. But how about the other way? From an Access table to a SQL server table. What are my options from within MS Access when I need high performance? (The normal approach of having an append query that appends to a linked table is simply too slow ) In an pass-through query I cannot reference MS Access tables or queries, and therefore my INSERT INTO statement cannot work. Is

问题 I have a .txt file with has the following format: /Users/my_user/folder1/myfile.dat /Users/my_user/folder2/myfile.dat /Users/my_user/folder3/myfile.dat . . . so on I want to append in the end of each line another folder path in order to make it look like this: /Users/my_user/folder1/myfile.dat,/Users/my_user/folder1/otherfile.dat /Users/my_user/folder2/myfile.dat,/Users/my_user/folder1/otherfile.dat /Users/my_user/folder3/myfile.dat,/Users/my_user/folder1/otherfile.dat . . . so on Till now I

问题 I'm trying to clone a list item, and then append it to the bottom of that cloned list item, note that it should be below the list item being cloned, not at the bottom of the list as I can do that myself. The purpose is to use it with jQuery.ui sortable. Everything is working fine, in fact I can even get the cloning and the appending right. However, it appends it before the closing </li> tag, and for the life of me I can't force it to append after this tag. This is the HTML Markup: <ul id=

问题 I am wondering if there is a way to tell the MediaRecorder to append to an existing audio file instead of starting it over from the beginning. In other words, I would like to call setOutputFile() with an existing file and have the new audio appended to that file instead of erasing it. 回答1: Android MediaRecorder does not support appending. Once you are recording the only possible actions are stop and reset. So one option is saving as a WAV file, and then append to an existing WAV file saved on

问题 I am having some trouble getting expected results out of the zip command. Cases 1-3 make sense, but in cases 4 and 5 (which I assume are equivalent?) I expect the results to be [['a'],['b'],['c'],['d']], but instead the entirety of the second list is appended to each sublist of the list of lists I initialize. Case 1: >>> for a in zip([1,2,3,4],['a','b','c','d']): ... print a (1, 'a') (2, 'b') (3, 'c') (4, 'd') Case 2: >>> for (a,b) in zip([1,2,3,4],['a','b','c','d']): ... print a,b ... 1 a 2

问题 I'm having an odd issue with jquery append method in Google Chrome where it is not writing a closing tag when the element is empty but will if the element contains a character. If I use this code: $('#workZone .canvas').each(function(i) { $(this).append('<canvas id="test"></canvas>'); }); } I get this in the markup: <canvas id="test"> If I use this code: $('#workZone .canvas').each(function(i) { $(this).append('<canvas id="test">i</canvas>'); }); } the I get what I'd expect to get in the

问题 I have an array, say int a[]={2,0,1,0,1,1,0,2,1,1,1,0,1,0,1}; I need to append each of the 5 neighboring elements and assign them to a new array b with length=(a.length/5); and i want to append the 5 neighboring elements so that I have: int b[]={20101,10211,10101}; I need to do this for various length arrays, in most cases with length of a being greater than 15. Any help would be greatly appreciated, I'm programming in Java. Thanks in advance. 回答1: It's pretty straighforward: // Assuming a

问题 I have been using Python's scipy.io.savemat() to save my data in .mat format, efficient way to transfer data between the two: http://docs.scipy.org/doc/scipy-0.9.0/reference/tutorial/io.html. Somehow it overwrite the file. How to set the function so I can append to the .mat file instead of overwriting just like MATLAB save()'s '-append' option? Or is there any ways to work it out other than scipy.io.savemat()? 回答1: There doesn't appear to be a way to append with scipy.io.savemat() . You can