Nope you cannot do that. The spec says so. The conditional operator has three operand expressions. ? appears between the first and second expressions, and : appears between the second and third expressions. The first expression must be of type boolean or Boolean, or a compile-time error occurs. It is a compile-time error for either … Read more
I would go with such code: var oBox = $(“#blackbox”); var curClass = oBox.attr(“class”); var newClass = (curClass == “bg_black”) ? “bg_pink” : “bg_black”; oBox.removeClass().addClass(newClass); To have it working, you first have to change your CSS and remove the background from the #blackbox declaration, add those two classes: .bg_black { background-color: #000; } .bg_pink { … Read more
The second and third arguments to the ternary operator are expressions, not statements. return a is a statement
This is a GNU C extension (see ?: wikipedia entry), so for portability you should explicitly state the second operand. In the ‘true’ case, it is returning the result of the conditional. The following statements are almost equivalent: a = x ?: y; a = x ? x : y; The only difference is in … Read more
If you are using a ternary operator like that, presumably it could be replaced by: if (a) { b; } which is much, much better. (The intent is clearer, so the code is easier to read, and there will be no performance loss.) However, if you are using the ternary operator as an expression, i.e. … Read more
No, you can’t. But what’s the point of this over an if-else statement? Are you really trying to save 7 characters? if (name.isChecked()) { name.setChecked(true); } else { name.setChecked(false); } or if you prefer bad style: if (name.isChecked()) name.setChecked(true); else name.setChecked(false); Never mind the fact that you can just do (in this case): name.setChecked(name.isChecked()); The … Read more
You can use for: product.getLatestVersion().getProductData().getTradeItem().getInformationProviderOfTradeItem().getGln(); optional equivalent: Optional.ofNullable(product).map( Product::getLatestVersion ).map( ProductVersion::getProductData ).map( ProductData::getTradeItem ).map( TradeItemType::getInformationProviderOfTradeItem ).map( PartyInRoleType::getGln ).orElse(null);
You can return from a ternary operator in javascript like this: return sort.attr(‘selected’) ? true : false;
Use Java 8 Optional (no filter needed): public static String orElse(String defaultValue) { return Optional.ofNullable(System.getProperty(“property”)).orElse(defaultValue); }
Yes, you can do this: <condition> and myList.append(‘myString’) If <condition> is false, then short-circuiting will kick in and the right-hand side won’t be evaluated. If <condition> is true, then the right-hand side will be evaluated and the element will be appended. I’ll just point out that doing the above is quite non-pythonic, and it would … Read more