Actually you can use if/else and switch and any other statement inline in dart / flutter. Use an immediate anonymous function class StatmentExample extends StatelessWidget { Widget build(BuildContext context) { return Text((() { if(true){ return “tis true”;} return “anything but true”; })()); } } ie wrap your statements in a function (() { // your … Read more
Should I use JSTL ? Yes. You can use <c:if> and <c:choose> tags to make conditional rendering in jsp using JSTL. To simulate if , you can use: <c:if test=”condition”></c:if> To simulate if…else, you can use: <c:choose> <c:when test=”${param.enter==’1′}”> pizza. <br /> </c:when> <c:otherwise> pizzas. <br /> </c:otherwise> </c:choose>
if is not a loop structure, so you cannot “break out of it”. You can, however, break out of the foreach by simply calling break. In your example it has the desired effect: $device = “wanted”; foreach($equipxml as $equip) { $current_device = $equip->xpath(“name”); if ( $current_device[0] == $device ) { // found a match in … Read more
You can use generator expressions like this: gen = (x for x in xyz if x not in a) for x in gen: print(x)
Use a generator together with any, which short-circuits on the first True: if any(ext in url_string for ext in extensionsToCheck): print(url_string) EDIT: I see this answer has been accepted by OP. Though my solution may be “good enough” solution to his particular problem, and is a good general way to check if any strings in … Read more
You don’t necessarily need jQuery. JavaScript alone will do this. var a = 2; var b = 3; var c = ((a < b) ? ‘minor’ : ‘major’); The c variable will be minor if the value is true, and major if the value is false. This is known as a Conditional (ternary) Operator. https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Conditional_Operator
Python variables are scoped to the innermost function, class, or module in which they’re assigned. Control blocks like if and while blocks don’t count, so a variable assigned inside an if is still scoped to a function, class, or module. (Implicit functions defined by a generator expression or list/set/dict comprehension do count, as do lambda … Read more
The else clause is only executed when your while condition becomes false. If you break out of the loop, or if an exception is raised, it won’t be executed. One way to think about it is as an if/else construct with respect to the condition: if condition: handle_true() else: handle_false() is analogous to the looping … Read more
For just a few items, the difference is small. If you have many items you should definitely use a switch. If a switch contains more than five items, it’s implemented using a lookup table or a hash list. This means that all items get the same access time, compared to a list of if:s where … Read more
try if ! grep -q sysa /etc/passwd ; then grep returns true if it finds the search target, and false if it doesn’t. So NOT false (! false) == true. if evaluation in shells are designed to be very flexible, and many times doesn’t require chains of commands (as you have written). Also, looking at … Read more