Use the first; it directly tries to check if something is defined in environ. Though the second form works equally well, it’s lacking semantically since you get a value back if it exists and only use it for a comparison. You’re trying to see if something is present in environ, why would you get just … Read more
You can use null coalescing operator. This operator returns right-hand operand if the left-hand operand is null. So you can return false when the CheckBox is in indeterminate state (when the value of IsChecked property is set to null): if (chkRevLoop.IsChecked ?? false) { }
Yes. There is the Conditional (Ternary) Operator. Example (pseudo): value = (expression) ? (if true) : (if false); Based on your example (valid code): int result = value ? 1 : 0;
If you want to know if an integer is in a given set of integers, then use std::set: std::set<int> accept { 1, 4, 6, 8, 255, 42 }; int x = 1; if (!accept.count(x)) { // … }
To avoid direct use of flow control statements like if or while you can use Math.min and Math.max. For this particular problem using a loop would not be efficient either. They may technically use an if statements or the equivalent, but so do a lot of your other standard library calls you already make: public … Read more
strchr() can be used to see if the character is in a list. const char* list = “ABCXZ”; if (strchr(list, ch)) { // ‘ch’ is ‘A’, ‘B’, ‘C’, ‘X’, or ‘Z’ }
You should use Strategies, possibly implemented within an enum, e.g.: enum UserType { ADMIN() { public void doStuff() { // do stuff the Admin way } }, STUDENT { public void doStuff() { // do stuff the Student way } }; public abstract void doStuff(); } As the code structure within each outermost if branch … Read more
You could use is instead? if ($(‘#menu-item-49’).is(‘.current-menu-item, .current-menu-parent’)) { $(‘ul.sub-menu ‘).css(‘display’, ‘block’); } Check the current matched set of elements against a selector and return true if at least one of these elements matches the selector. Beats having to use multiple hasClass queries, which is the alternative: if ($(‘#menu-item-49’).hasClass(‘current-menu-item’) || $(‘#menu-item-49’).hasClass(‘current-menu-parent’)) { $(‘ul.sub-menu ‘).css(‘display’, ‘block’); … Read more