Decorators are simply callables that return a replacement, optionally the same function, a wrapper, or something completely different. As such, you could create a conditional decorator: def conditional_decorator(dec, condition): def decorator(func): if not condition: # Return the function unchanged, not decorated. return func return dec(func) return decorator Now you can use it like this: @conditional_decorator(timeit, … Read more
That specific command can be done like this: insert into LeadCustomer (Firstname, Surname, BillingAddress, email) select ‘John’, ‘Smith’, ‘6 Brewery close, Buxton, Norfolk’, ‘cmp.testing@example.com’ where not exists ( select 1 from leadcustomer where firstname=”John” and surname=”Smith” ); It will insert the result of the select statement, and the select will only return a row if … Read more
Null OR an empty string? if (!empty($user)) {} Use empty(). After realizing that $user ~= $_POST[‘user’] (thanks matt): var uservariable=”<?php echo ((array_key_exists(“user’,$_POST)) || (!empty($_POST[‘user’]))) ? $_POST[‘user’] : ‘Empty Username Input’; ?>’;
First, having the Conditional attribute is not equivalent to having #if inside the method. Consider: ShowDebugString(MethodThatTakesAges()); With the real behaviour of ConditionalAttribute, MethodThatTakesAges doesn’t get called – the entire call including argument evaluation is removed from the compiler. Of course the other point is that it depends on the compile-time preprocessor symbols at the compile … Read more
Airflow 2.x Airflow provides a branching decorator that allows you to return the task_id (or list of task_ids) that should run: @task.branch(task_id=”branch_task”) def branch_func(ti): xcom_value = int(ti.xcom_pull(task_ids=”start_task”)) if xcom_value >= 5: return “big_task” # run just this one task, skip all else elif xcom_value >= 3: return [“small_task”, “warn_task”] # run these, skip all else … Read more
Avoid browser-sniffing and conditional comments (which aren’t supported as of Internet Explorer 10), and instead take a more standard approach. With this particular issue you should be targeting the ::-ms-expand pseudo element: select::-ms-expand { display: none; }
I think what you are asking for will work by joining the Initial table to both Option_A and Option_B using LEFT JOIN, which will produce something like this: Initial LEFT JOIN Option_A LEFT JOIN NULL OR Initial LEFT JOIN NULL LEFT JOIN Option_B Example code: SELECT i.*, COALESCE(a.id, b.id) as Option_Id, COALESCE(a.name, b.name) as Option_Name … Read more
If you look at the documentation of StringBuilder it has only 4 properties. One of them is Length. The length of a StringBuilder object is defined by its number of Char objects. You can use the Length property: Gets or sets the length of the current StringBuilder object. StringBuilder sb = new StringBuilder(); if (sb.Length … Read more
The comparsion of double values using ‘==’ is not very reliable and should be avoided (not only in Dart but in most languages). You could do something like methodname(num radians) { // you can adjust this values according to your accuracy requirements const myPI = 3142; int r = (radians * 1000).round(); switch (r) { … Read more
new-if is a function. When a function is called, what’s the first thing that Scheme does with the argument list? It evaluates all the arguments.