$type: monster; p { @if $type == ocean { color: blue; } @else if $type == matador { color: red; } @else if $type == monster { color: green; } @else { color: black; } } Disadvantages are, that you're bound to pre-process your stylesheets, and that the condition is ev...
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使用if else循环时出现错误"the condition has length >1 and only the first element will be used“(条件长度大于1,只使用第一个元素问使用if else循环时出现错误"the condition has length >1 and only the first element will be used“(条件长度大于1,只使用第一个元素EN Stack Overflow用户提问于 2019-...
<%@ taglib prefix='c' uri='http://java.sun.com/jsp/jstl/core' %> <c:set var="isiPad" value="value"/> <c:choose> <!-- if condition --> <c:when test="${...}">Html Code</c:when> <!-- else condition --> <c:otherwise>Html code</c:otherwise> </c:choose> Share Im...
if和else应该在长度为1的逻辑条件上使用。您正在询问某个长度为n的向量(OldTimeColumn)是否等于一个值为TRUE的向量--这就是为什么警告消息会说出它所说的内容,并且它只通过将OldTimeColumn的第一个元素与TRUE进行比较来评估它。 对于您的特定示例,更好的方法可能是使用case_when结构。 代码语言:javascript 复制 lib...
It's a second-hand bike, but it's in good condition. (Text 2) W: Don't stay up too late chatting with friends, Jimmy. You have to go to school early in the morning. M: Okay. I'm done chatting, but I have a couple of chapters to read before bed. (Text 3) M: What would...
C Pointers questions -1 Related Read:Nested if else Statement In C Simple Logic: Student Grade First in if‘s condition we check if the user entered percentage is above 100%. If true – in that case we let the user know that he entered wrong marks and he / she needs to re-enter th...
Understanding Advance File Handling Functions in C 100 Multiple choice questions in CConditional statements are statements, which are executed depending on some condition being satisfied as true or false. In this tutorial, we will try to learn some conditional statements which include: If-else, switc...
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if1==2{println!("True, the numbers are equal.");//}else{println!("False, the numbers are not equal."); } In this example, the condition ofifis the expression1 == 2, which evaluates into a boolean type with the value false. ...