Unfortunately this shorthand notation (which calls “Symbol#to_proc”) does not have a way to pass arguments to the method or block being called, so you couldn’t even do the following: array_of_strings.map(&:include, ‘l’) #=> this would fail BUT, you are in luck because you don’t actually need this shortcut to do what you are trying to do. … Read more
var x = y !== undefined ? y : 1; Note that var x = y || 1; would assign 1 for any case where y is falsy (e.g. false, 0, “”), which may be why it “didn’t work” for you. Also, if y is a global variable, if it’s truly not defined you may … Read more
you can use && operator – second operand expression is executed only if first is true direction == “right” && slideOffset += $(“.range-slide”).width() in my opinion if(conditon) expression is more readable than condition && expression
Try this code Object x = 1; String y = “”; x += y; //compile error x = x + y; //works properly not entirely sure why this works, but the compiler says The operator += is undefined for the argument type(s) Object, String and I assume that for the second line, toString is called … Read more
In the context of “nit: removed whitespace,” I would assume that the term is short for nit-pick. That is, a small change that may not be very important, but is technically correct.
There’s only one type of “if” statement there. The other is a conditional expression. As to which will perform better: they could compile to the same bytecode, and I would expect them to behave identically – or so close that you definitely wouldn’t want to choose one over the other in terms of performance. Sometimes … Read more
Update for PHP 7 (thanks shock_gone_wild) PHP 7 introduces the null coalescing operator which simplifies the below statements to: $var = $var ?? “default”; Before PHP 7 No, there is no special operator or special syntax for this. However, you could use the ternary operator: $var = isset($var) ? $var : “default”; Or like this: … Read more
Yes, both of them are read-only, but there is a difference. In the first one, there’s a backing field which is initialized to 0 before the constructor is executed. You can change the value only in the constructor, just like a regular read-only field. The getter itself just returns the value of the field. In … Read more
The shorthand is: $(function() { // Code here });
What you have is a fairly unusual use of the ternary operator. Usually it is used as an expression, not a statement, inside of some other operation, e.g.: var y = (x == 2 ? “yes” : “no”); So, for readability (because what you are doing is unusual), and because it avoids the “else” that … Read more