If you’re referring to else if statements in dart, then this ternary operator: (foo==1)? something1():(foo==2)? something2(): something3(); is equivalent to this: if(foo == 1){ something1(); } elseif(foo == 2){ something2(); } else something3();
That’s just horrible code. It’s badly formatted. I don’t see the hierarchy of the expression. Even if it had good formatting, the expression would be way too complex to quickly parse with the human eye. The intention is unclear. What’s the purpose of those conditions? So what can you do? Use conditional statements (if). Extract … Read more
Use CASE WHEN .. THEN .. ELSE .. END, e.g.: SELECT (CASE WHEN (field1 IS NULL OR field1 = ”) THEN field2 ELSE field1 END) FROM table; Check it out at the official docs.
Yes you can go wild nesting ternaries. I find this version to be fairly readable: var foo = ( bar === ‘a’ ? 1 : // if bar === ‘b’ ? 2 : // else if bar === ‘c’ ? 3 : // else if null // else ); but that’s not a widely shared … Read more
It is not permitted by the language C (as far as I know), but compilers such as gcc have the shortcut a?:c as an extension. a?:c means the same as a?a:c.
Seems like your problem is solved already, but there are plenty of easier methods to do it. Excellent one: .filter(Boolean); // will keep every truthy value in an array const arr = [true, false, true, false, true]; const count = arr.filter(Boolean).length; console.log(count); Good one: const arr = [true, false, true, false, true]; const count = … Read more
There is no way to do this, and that’s intentional. The ternary if is only supposed to be used for trivial cases. If you want to use the result of a computation twice, put it in a temporary variable: value = info.findNext(“b”) value = value if value else “Oompa Loompa” Once you do this, it … Read more
There is no way to do this, and that’s intentional. The ternary if is only supposed to be used for trivial cases. If you want to use the result of a computation twice, put it in a temporary variable: value = info.findNext(“b”) value = value if value else “Oompa Loompa” Once you do this, it … Read more
I tested the following page in Tomcat 5.59, JSP 2.0 and JSTL 1.1. It ran without any errors. <%@taglib uri=”http://java.sun.com/jsp/jstl/core” prefix=”c”%> <c:set var=”value” scope=”request” value=”someValue”/> <c:out default=”None” escapeXml=”true” value=”${not empty value ? value : ‘None’}” /> <c:out default=”None” escapeXml=”true” value=”${empty value ? ‘None’ : value}” /> <c:set var=”value” scope=”request” value=”” /> <br/> <c:out default=”None” escapeXml=”true” … Read more