ternary-operator

问题 I want to assign value conditionally if parent element has a specific class. Exp: HTML <div class="parent"> <div class="child">Some Text</div> </div> CSS .child { font-size: 16px; } but if parent element has a class named "big" HTML <div class="parent big"> <div class="child">Some Text</div> </div> I want to change value as follows CSS .child { font-size: 20px; } For example as follows: .child { font-size: parent.hasClass('big') ? 20px : 16px; } How can I do that in SASS? 回答1: Simply create

问题 To improve code readability I need to split my ternary operator expression into multiple lines. My only idea is something like this: very_long_function_name( ... very_long_expression_if_the_condition_is_true if the_condition else another_expression_if_the_condition_is_false) Unfortunately PyCharm claims that continuation line over-indented for visual indent is a violation of PEP8. When I wrap the operator in braces PyCharm raises no objections, but IMHO the code is less readable then. Is

问题 I'm developing application using Grails framework and I'm having problems with hasErrors when invoked as a method from a gsp view. I have a form that get's populated by values from a database (default values). Those values are stored in a session object. Users can edit values in form fields and send results back to the database. Before data gets persisted I have a command object that validates data. If there are errors command objects renders view with the same form and errors highlighted.

问题 First of all, apologies for the following question, i am new to java, i have taken the example from a book but it fails to completely explain itself. I have been reading about the ? operator and how it functions and using the below as an example to learn from: class Ternary { public static void main(String args[]) { int i, k; i = 10; k = i < 0 ? -i : i; // get absolute value of i System.out.print("Absolute value of "); System.out.println(i + " is " + k); i = -10 k = i < 0 ? -i : i; //get

问题 This question already has answers here : Java Ternary without Assignment (4 answers) Closed 3 years ago . This is my ternary condition in Java. new_user_id.equals(userid) && new_key.equals(key) && !new_value.equals(value) ? updateValue() : System.out.println("New value already exists in DB"); I'm trying to match three conditions and call updateValue() function if all three conditions gets true. But still its throwing error "The left-hand side of an assignment must be a variable". Any ideas?

问题 I have two checkbox in a <form> . The <form> have an onChange={this.checkBoxOnChange} assigned to it which fires up checkBoxOnChange(event){..} function on every change in the form. I am trying to map (Log) the status (ie whether they are checked or not) . So, I've initially taken there value as false as they are not-checked then on each event I'm trying to change there value respectively (ie if false the true & vice versa) . On following this SO post I tried this: (event.target.value==

问题 For my task, I have a done a piece of code like to fetch the user details, var data = userInfo.map(function (element) { if (element[9].search("Active") != -1) { return { 'LastName': Capitalizefirstletter(element[1]), 'FirstName': Capitalizefirstletter(element[2]), 'UserName': element[3], 'IsActiveUser': "True" }; } else { return { 'LastName': Capitalizefirstletter(element[1]), 'FirstName': Capitalizefirstletter(element[2]), 'UserName': element[3], 'IsActiveUser': "False" }; } } which is

问题 Imagine that I have a link button called "readMore" in the ItemTemplate of a repeater, and I want to set display: none; for it, when the content of each post is less than say, 2000 characters. <asp:repeater id="postsRepeater" runat="server" onitemdatabound="postsRepeater_ItemDataBound"> <ItemTemplate> <a class="button" href="#" runat='server' id='more'>Read More</a> </ItemTemplate> </asp:repeater> In PHP, you can simply write something like: <?php echo (contentLength < 2000 ? 'display: none;'

问题 This question already has answers here : To ternary or not to ternary? [closed] (54 answers) Closed 4 years ago . I really really like the conditional operator in C#. It makes my life very much easier in writing logic such as this: public string FormattedFileName { get { return string.Format("{0}_{1}_{2}_{3}.xls", DateTime.Now.Month.ToString().Length == 1 ? "0" + DateTime.Now.Month.ToString() : DateTime.Now.Month.ToString(), DateTime.Now.Day.ToString().Length == 1 ? "0" + DateTime.Now.Day

问题 Python, Java and Scala have ternary operators. What is the equivalent in Julia? 回答1: For inline use, a ? b : c exists, as mentioned by the previous answer. However it is worth noting that if-else-end in Julia works just like (if cond expr1 expr2) in most Lisp dialects which acts both as the if-clause and as the ternary operator. As such, if-then-else returns the return value of the expression that gets executed. Meaning that you can write things like function abs(x) if x > 0 x else -x end end