Ahh, don't you just love a good ternary abuse? :) Consider the following expression: true ? true : true ? false : false For those of you who are now utterly perplexed, I can tell you that this evaluates to true. In other words, it's equivalent to this: true ? true : (true ? false : false) But is this reliable? Can I be certain that...
I came across the following line in a JS function (it was an RGB to HSB color converter, if you must know) hsb.s = max != 0 ? 255 * delta / max : 0; I'm wondering if someone can explain what the "?" and the ":" mean in this context. ...
I cant seem to wrap my head around the first part of this code ( += ) in combination with the ternary operator. h.className += h.className ? ' error' : 'error' The way i think this code works is as following. h.className = h.className + h.className ? ' error' : 'error' But that isn't correct because that gives a error in my consol...
Hello guys, i tried something like this: boolean funkyBoolean = true; int array[] = funkyBoolean ? {1,2,3} : {4,5,6}; But this code won't even compile. Is there any explanation for this? isn't funkyBoolean ? {1,2,3} : {4,5,6} a valid expression? thank's in advance! ...
Is this an acceptable coding practice? public class MessageFormat { private static final Color DEFAULT_COLOR = Color.RED; private Color messageColor = DEFAULT_COLOR; public MessageFormat(Person person) { Color color = person.getPreferredColor(); messageColor = (color != null) ? color : messageColor; // this...
def val(): var = float(raw_input("Age:")) status = ("Working","Retired")[var>65] print "You should be:",status I was looking on how the ternary operator is implemented in python. I found the code mentioned above as a substitute (from what i have read, found that the ternary operator does not exist, I will be happy to know m...
Is it possible to rewrite this to be shorter somehow? if (isset($_POST['pic_action'])){ $pic_action=$_POST['pic_action']; } else { $pic_action=0; } I have seen it somewhere but forgot... :/ BTW, please explain your code also if you like! Thanks ...
I saw this today in some PHP code. $items = $items ?: $this->_handle->result('next', $this->_result, $this); What is the ?: doing? Is it a Ternary operator without a return true value? A PHP 5.3 thing? I tried some test code but got syntax errors. ...
i'm new to php. I came across this syntax in wordpress. Can anyone explain to me the last line of that code? $page = $_SERVER['REQUEST_URI']; $page = str_replace("/","",$page); $page = str_replace(".php","",$page); **$page = $page ? $page : 'default'** the last line(bolded). thanks ...
Possible Duplicate: What is the PHP ? : operator called and what does it do? From http://twitto.org/ <?PHP require __DIR__.'/c.php'; if (!is_callable($c = @$_GET['c'] ?: function() { echo 'Woah!'; })) throw new Exception('Error'); $c(); ?> Twitto uses several new features available as of PHP 5.3: The DIR constant The ...
Is there a ruby idiom for "If do-this," and "do-this" just as a simple command? for example, I'm currently doing object.method? a.action : nil to leave the else clause empty, but I feel like there's probably a more idiomatic way of doing this that doesn't involve having to specify a nil at the end. (and alternatively, I feel like ta...
I want to create a ternary operator for a < b < c which is a < b && b < c. or any other option you can think of that a < b > c and so on... I am a fan of my own shortform and I have wanted to create that since I learned programming in high school. How? ...
So I'm not going for maintainability or elegance here.. looking for a way to cut down on the total tokens in a method just for fun. The method is comprised of a long nested if-else construct and I've found that (I think) the way to do it with the fewest tokens is the ternary operator. Essentially, I translate this: String method(param) ...
I was looking at some code with a huge switch statement and an if-else statement on each case and instantly felt the urge to optimize. As a good developer always should do I set out to get some hard timing facts and started with three variants: The original code looks like this: public static bool SwitchIfElse(Key inKey, out char key,...
Here's a test for fun with the ternary operator: public int so( final int a ) { int r = (int) System.currentTimeMillis(); r += a == 2 ? 1 : 0; return r; } Here's the bytecode produced: public int doIt(int); Code: 0: invokestatic #2; //Method java/lang/System.currentTimeMillis:()J 3: l2i 4: istore_2 ...
Do you find the following C# code legible? private bool CanExecuteAdd(string parameter) { return this.Script == null ? false : parameter == "Step" ? true : parameter == "Element" ? this.ElementSelectedInLibrary != null && this.SelectedStep != null : parameter == "Choice" ? this.SelectedElement != null...
Those of us who've worked in VB/VB.NET have seen code similar to this abomination: Dim name As String = IIf(obj Is Nothing, "", obj.Name) I say "abomination" for three simple reasons: IIf is a function, all of whose parameters are evaluated; hence if obj is nothing in the above call then a NullReferenceException will be thrown. This...
Hi all, Just out of curiosity, asking this Like the expression one below a = (condition) ? x : y; // two outputs why can't we have an operator for enums? say, myValue = f ??? fnApple() : fnMango() : fnOrange(); // no. of outputs specified in the enum definition instead of switch statements (even though refactoring is possible)...
I recently refactored code like this (MyClass to MyClassR). #include <iostream> class SomeMember { public: double m_value; SomeMember() : m_value(0) {} SomeMember(int a) : m_value(a) {} SomeMember(int a, int b) : m_value(static_cast<double>(a) / 3.14159 + static_cast<double>(b) / 2.71828) {} }; class MyClass ...
can every if...then...else statement be converted into an equivalent statement using only ?: ...