If you absolutely want to raise in an expression, you could do def raiser(ex): raise ex return <value> if <bool> else raiser(<exception>) This “tries” to return the return value of raiser(), which would be None, if there was no unconditional raise in the function.
var query = someList.Where(a => (someCondition)? a == “something” : true); so, if ‘someCondition’ is false, ‘Where’ will be skipped.
Reasons NOT to use short-circuit evaluation: Because it will behave differently and produce different results if your functions, property Gets or operator methods have side-effects. And this may conflict with: A) Language Standards, B) previous versions of your language, or C) the default assumptions of your languages typical users. These are the reasons that VB … Read more
You probably forgot the endif of the alternative control structure syntax: <?php if(check if user is logged in): ?> <display users profile in html> <?php else: ?> <display an error> <?php endif; ?> Omitting the braces as you wrote is not possible. It is only possible if it is followed by a regular statement.
Starting Python 3.8, and the introduction of assignment expressions (PEP 572) (:= operator), it’s now possible to capture an expression value (here sys.stdin.read(1)) as a variable in order to use it within the body of while: while (i := sys.stdin.read(1)) != ‘\n’: do_smthg(i) This: Assigns sys.stdin.read(1) to a variable i Compares i to \n If … Read more
You can silence the Rails logger object: def action Rails.logger.silence do # Things within this block will not be logged… end end
There’s an answer here using min/max and no branches (https://stackoverflow.com/a/14676309/2233603). Actually 4 min/max operations are enough to find the median, there’s no need for xor’s: median = max(min(a,b), min(max(a,b),c)); Though, it won’t give you the median value’s index… Breakdown of all cases: a b c 1 2 3 max(min(1,2), min(max(1,2),3)) = max(1, min(2,3)) = max(1, … Read more
The && and || operators short-circuit. That is: 1) If && evaluates its first operand as false, it does not evaluate its second operand. 2) If || evaluates its first operand as true, it does not evaluate its second operand. This lets you do null check && do something with object, as if it is … Read more
First have a look at the free, official Rust book The Rust Programming Language, specifically the chapter on enums. match fn initialize(datastore: DatabaseType) { match datastore { DatabaseType::Memory => { // … } DatabaseType::RocksDB => { // … } } } if let fn initialize(datastore: DatabaseType) { if let DatabaseType::Memory = datastore { // … … Read more
You can use the Logical NOT ! operator: if (!$(this).parent().next().is(‘ul’)){ Or equivalently (see comments below): if (! ($(this).parent().next().is(‘ul’))){ For more information, see the Logical Operators section of the MDN docs.