clear

I am using the select function for communication between my sockets. I have a while loop and I do - while(!done) { FD_ZERO(&read_flags); FD_ZERO(&write_flags); FD_SET(comm_fd1, &read_flags); FD_SET(comm_fd2, &read_flags); FD_SET(STDIN_FILENO, &read_flags); FD_SET(comm_fd1, &write_flags); FD_SET(comm_fd2, &write_flags); FD_SET(STDIN_FILENO, &write_flags); //call select sel = select(comm_fd1+comm_fd2+1, &read_flags, &write_flags, (fd_set*)0, &waitd); and the same with different variables on the client side. I got this basic technique from a tutorial online and just went with it. Then it hit me -

How do I clear the dropdownlist values on button click event using jQuery? A shorter alternative to the first solution given by Russ Cam would be: $('#mySelect').val(''); This assumes you want to retain the list, but make it so that no option is selected. If you wish to select a particular default value, just pass that value instead of an empty string. $('#mySelect').val('someDefaultValue'); or to do it by the index of the option, you could do: $('#mySelect option:eq(0)').attr('selected','selected'); // Select first option $('#dropdownid').empty(); That will remove all <option> elements

I'm programming in c#(WPF). I have a lot of nested controls . I want to clear all of my TextBox control which are in my application. It is very hard to access them by their name. Is there any way to access them recursively and clear them? for example some thing like this: public void ClearAll(Control c) { if(c is TextBox) { ((TextBox)c).Clear(); return; } foreach(Control child in GetChild(c)) { ClearAll(child); } } The VisualTreeHelper class comes handy. You can use it like this: static public void TraverseVisualTree(Visual myMainWindow) { int childrenCount = VisualTreeHelper.GetChildrenCount

I understand that the complexity of the clear() operation is linear in the size of the container, because the destructors must be called. But what about primitive types (and POD)? It seems the best thing to do would be to set the vector size to 0, so that the complexity is constant. If this is possible, is it also possible for std::unordered_map? dasblinkenlight It seems the best thing to do would be to set the vector size to 0, so that the complexity is constant. In general, the complexity of resizing a vector to zero is linear in the number of elements currently stored in the vector .

I have the below JQuery Dialog script, I'm trying to find out how to fire off a function that clears the form when I close the dialog. function clearForm() { $(':input','#calcQuery') .not(':button, :submit, :reset, :hidden') .val(''); }; // form popup $(document).ready(function() { //var dataString = $("#calcQuery").serialize(); $("#formBox").dialog({ bgiframe: true, autoOpen: false, height: 600, width: 400, modal: false, closeOnEscape: true, title: "Calculator", buttons: { "Calculate": function() { // form post $.ajax({ type: "POST", url: "calc.php", data: $("#calcQuery").serialize(),

Is there any way to clear absolutely positioned elements with CSS? I'm creating a page where I need each part of the site (section element) to be absolutely positioned, and I want to apply a footer with content below those elements. Tried to relatively position the header and footer to see if a total height would be taken into account but the footer still gets "trapped" underneath the section elements. Any ideas? <header style="position: relative;"></header> <div id="content" style="position: relative;"> <section id="a" style="position: absolute;"></section> <section id="b" style="position: