It’s because you have #include <stdbool.h>. That header defines macros true and false to be 1 and 0, so your statement looks like this: printf(“%zu\n”, sizeof(a ? 1 : 0)); // Why 4? sizeof(int) is 4 on your platform.
If I recall correctly Twig doesn’t support || and && operators, but requires or and and to be used respectively. I’d also use parentheses to denote the two statements more clearly although this isn’t technically a requirement. {%if ( fields | length > 0 ) or ( trans_fields | length > 0 ) %} Expressions … Read more
var startingNumber = startingNumber || 1; Something like that what you’re looking for, where it defaults if undefined? var foo = bar || 1; // 1 var bar = 2; foo = bar || 1; // 2 By the way, this works for a lot of scenarios, including objects: var foo = bar || {}; … Read more
This is the ternary conditional operator, which can be used anywhere, not just the print statement. It’s sometimes just called “the ternary operator”, but it’s not the only ternary operator, just the most common one. Here’s a good example from Wikipedia demonstrating how it works: A traditional if-else construct in C, Java and JavaScript is … Read more
As the comments mentioned, Go doesn’t support ternary one liners. The shortest form I can think of is this: var c int if c = b; a > b { c = a } But please don’t do that, it’s not worth it and will only confuse people who read your code.
&& works by stringing-together multiple selectors like-so: <div class=”class1 class2″></div> div.class1.class2 { /* foo */ } Another example: <input type=”radio” class=”class1″ /> input[type=”radio”].class1 { /* foo */ } || works by separating multiple selectors with commas like-so: <div class=”class1″></div> <div class=”class2″></div> div.class1, div.class2 { /* foo */ }
The (condition) ? /* value to return if condition is true */ : /* value to return if condition is false */ ; syntax is not a “shorthand if” operator (the ? is called the conditional operator) because you cannot execute code in the same manner as if you did: if (condition) { /* condition … Read more
The compiler is telling you that it doesn’t know how convert null into a DateTime. The solution is simple: DateTime? foo; foo = true ? (DateTime?)null : new DateTime(0); Note that Nullable<DateTime> can be written DateTime? which will save you a bunch of typing.
Well, first of all, it’s much easier to chain than the standard ternary operator: string anybody = parm1 ?? localDefault ?? globalDefault; vs. string anyboby = (parm1 != null) ? parm1 : ((localDefault != null) ? localDefault : globalDefault); It also works well if a null-possible object isn’t a variable: string anybody = Parameters[“Name”] ?? … Read more
if (myString != null && !myString.isEmpty()) { // doSomething } As further comment, you should be aware of this term in the equals contract: From Object.equals(Object): For any non-null reference value x, x.equals(null) should return false. The way to compare with null is to use x == null and x != null. Moreover, x.field and … Read more