append

问题 I've recently been messing around with Go and I wanted to see how it would be to delete an element from a two-dimensional slice. For deleting an element from a one-dimensional slice, I can successfully use: data = append(data[:i], data[i+1:]...) However, with a two-dimensional slice, using: data = append(data[i][:j], data[i][j+1:]...) throws the error: cannot use append(data[i][:j], data[i][j+1:]...) (type []string) as type [][]string in assignment Would tackling this require a different

问题 These two jQuery Mobile checkboxes have different styling, however I believe I am creating them in very similar ways. The top boxes I am appending dynamically, where as the bottom box is hardcoded. Does anybody know why this is this discrepancy in styles? Div to hold fieldset <fieldset id="surveyViewer" data-role="controlgroup"> </fieldset> Appending radio buttons $('#surveyViewer').append('<legend>Survey Preview:</legend><input type="radio" name="options" id="1" value="1" /><label for="1">1<

问题 What is the idiomatic way to collect results in a loop in R if the number of final results is not known beforehand? Here's a toy example: results = vector('integer') i=1L while (i < bigBigBIGNumber) { if (someCondition(i)) results = c(results, i) i = i+1 } results The problem with this example is that (I assume) it will have quadratic complexity as the vector needs to be re-allocated at every append. (Is this correct?) I'm looking for a solution that avoids this. I found Filter , but it

问题 If I have a serialized array... how can I append more values to it? Should I unserialize it first -> add data and then serialize it again? 回答1: Yes. function addItem($serializedArray, $item) { $a = unserialize($serializedArray); $a[] = $item; return serialize($a); } 回答2: Unserializing is the way to go, definitely. Unless you have a huge string, it'd be strongly recommended, unless you want to make your own strict interpreter. Changing anything from a serialized array/object should be done

问题 I'm trying to append a new float element to a list within another list, for example: list = [[]]*2 list[1].append(2.5) And I get the following: print list [[2.5], [2.5]] When I'd like to get: [[], [2.5]] How can I do this? Thanks in advance. 回答1: lst = [[] for _ in xrange(2)] (or just [[], []] ). Don't use multiplication with mutable objects — you get the same one X times, not X different ones. 回答2: list_list = [[] for Null in range(2)] dont call it list , that will prevent you from calling

问题 So I need to grab content from a specific class and put it in a div, which I use append for...my issue is that append removes the item I append, and I need it to stay there, Here is my code: $(document).ready(function(){ var $content = $('#popupcontent'); var $window = $('#popupwindow'); $('.open').click(function(){ //alert('runnning'); var a = $(this).contents('span'); $content.append(a); $window.fadeIn(300); }); $('.close').click(function(){ //alert('running'); var a = $content.contents(

问题 My program is currently using FileOutputStream output = new FileOutputStream("output", true); A while loop creates the output file if it is not yet created and appends some data to this file for every iteration of the while loop using output.write(data). This is fine and is what I want. If I run the program again the file just doubles in size as it appends the exact information to the end of the file. This is not what I want. I would like to overwrite the file if I run the program again. 回答1:

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Change URL parameters with jQuery? Currently, I have a <div> tag that looks like a button and changes the URL with an onClick function which redirect to the same page just adds &view_all=Yes or &view_all=No to the URL. <div onclick="javascript:window.location.href = 'page.php?action=list-volunteer-apps&view-all=No';">Hide Closed Applications</div> Well, I am adding a new feature to the website and I need to be

问题 I just received some great advice on a previous question regarding appending text lines to the beginning of a .txt output. This worked well for my example data, but I now realize that my actual data has a variable of the POSIXlt class, which contains a space between the day and hour values (e.g. "2001-01-01 10:00:01"). This seems to be causing problems for R to understand how many columns of data their are. I have tried variations on both suggestions given to the previous question, but

问题 This question already has answers here : Adding code to a javascript function programmatically (6 answers) Closed 6 years ago . There is some javascript code, e.g. function hello() { } function world() { } I want to add some logging code to them, but I don't want to modify the code. I hope I can write some code in another file, and it will modify the functions at runtime. It is possible to do this? Update Thanks for the two answers, but I have to make this question clearer. The hello and