dynamic

问题 I have implement a similar design as https://github.com/chrisbanes/cheesesquare A collapsible toolbar with an image inside that collapse when scrolling down <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true"> <android.support.design

问题 i write a stack class in c++ (shown below) but it is static and sure it uses lots of memory's. how can i make it dynamic so when ever it need it add some memory to the object and when ever i pop something the memory automatically delete? template <class T> class stack { private: T value[512]; uint16_t length; public: stack() { length=0; } stack(T _input) { value[0]=_input; length=1; } bool push(T _input) { if(length+1<512) { value[++length]=_input; return true; } else return false; } T pop()

问题 I built a framework that allows for cascaded sorting of report data in a table depending on what column is the master sorted column. It works for the most part, except in one specific, but important case: when the field's property is a value type. I receive the following error message: System.ArgumentException: Expression of type 'System.Int32' cannot be used for return type 'System.Object' I know that this means I need to box the value of the ValueType, but I'm not completely sure how to in

问题 I have the following three controls which all have same class named "txt11" and I want to change the readonly property of all three textboxes to false whenever I click edit button. $(".btn11").click(function(){ $(".txt11").focus(); $(".txt11").prop("readonly", false); }); <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input readonly="" name="txtSkill[]" value="database" class="txt11"> <input readonly="" name="txtSkill[]" value="sql" class="txt11">

问题 I have the following three controls which all have same class named "txt11" and I want to change the readonly property of all three textboxes to false whenever I click edit button. $(".btn11").click(function(){ $(".txt11").focus(); $(".txt11").prop("readonly", false); }); <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input readonly="" name="txtSkill[]" value="database" class="txt11"> <input readonly="" name="txtSkill[]" value="sql" class="txt11">

问题 I have three tables, the first is a table storing applications, the second is a table storing different online forms (different types of applications), the third is a table that stores actual form data: TABLE applications========= -applicationID (PK) -formID (FK) -formRecordID ==================== TABLE forms========= -formID (PK) -formName -tableName (could be 'form_businessLicense','eventLicense',etc) ==================== TABLE form_businessLicense===== -recordID (PK) -dateSubmitted -(a

问题 I'm trying to use dplyr against my postgres database and am conducting a simple function. Everything works if I parse the column name directly, however I want to do this dynamically (i.e. sort through each column name from another dataframe The problem I'm geeting is for the first two calculations, i'm getting the right results Assume the first dynamic column is called "id" pull_table %>% summarise( row_count = n(), distinct_count = n_distinct(var) , distinct_count_minus_blank = n_distinct

问题 This question already has answers here : Hide A DIV if screen is narrower than 1024px (3 answers) Closed 6 years ago . I want some images to not be displayed if the persons browser window is too small. Would I do this in CSS or Javasript, and if so, how? 回答1: @media all and (max-width: 500px){ /* max screen size */ #div { display: none; } } 回答2: You don't have to use JavaScript, you can simply do it with CSS @media queries @media all and (max-width: 699px) { /* Change Width Here */ div.class

问题 First of all I will make it clear, that I went through the below link and yet found it difficult to address my issue. Link1, Link2, Link3 Issue: I have the below loaded on my page: <div class="btn-group"> <label class="someClassDifferentForEachLoadedElement btn btn-primary " onclick="$('#someIdDifferentForEvryElement') .find('label.active') .toggleClass('active', false); $(this).toggleClass('active', true);"> <input class="validated" style="display:none" toggle="true" toggle- checkbox="false"

问题 setInterval(this.Animate(), this.speed); This is expected to be run every this.speed times. Yes, but the browsers run it only one time. What are the possible reasons for that? 回答1: If Animate is a derived function from the prototype, you'll have to use: setInterval(this.Animate.bind(this), this.speed); 回答2: Try to run your function without the parentheses, when you put parentheses it always calls the function instead of passing it, which is what you want here: setInterval(this.Animate, this