Range takes, 1, 2, or 3 arguments. This could be implemented with def range(*args), and explicit code to raise an exception when it gets 0 or more than 3 arguments. It couldn’t be implemented with default arguments because you can’t have a non-default after a default, e.g. def range(start=0, stop, step=1). This is essentially because … Read more
Passing null or “” for a parameter you don’t want to specify still results in those nulls and empty strings being passed to the function. The only time the default value for a parameter is used is if the parameter is NOT SET ALL in the calling code. example(‘a’) will let args #2 and #3 … Read more
With default parameter values added in ES2015, you can declare default values for the parameters, and when making the call, if you pass undefined as the first parameter, it will get the default: function test(a = “ay”, b = “bee”) { console.log(`a = ${a}, b = ${b}`); } test(); // “a = ay, b = … Read more
Gradle 4.9+ gradle run –args=”arg1 arg2″ This assumes your build.gradle is configured with the Application plugin. Your build.gradle should look similar to this: plugins { // Implicitly applies Java plugin id: ‘application’ } application { // URI of your main class/application’s entry point (required) mainClassName=”org.gradle.sample.Main” } Pre-Gradle 4.9 Include the following in your build.gradle: run … Read more
If you construct a string such as -t foo and pass it via a variable to an external program, it is passed as a single, double-quoted argument (that is, donet will literally see “-t foo” on its command line) – and therefore won’t be recognized as parameter name-value combination. You must pass -t and foo … Read more
This does not call test in a new thread: thread = threading.Thread(target=test(“Test”)) thread.start() Here’s how Python interprets those lines of code: Main thread calls test(“Test”). test(“Test”) returns None. Main thread calls Thread(target=None).* Main thread starts the new thread. New thread does absolutely nothing at all because its target is None. Edit: *I wondered why Thread(targe=None) … Read more
Use a “closure”: $(edit_link).click(function(){ return changeViewMode(myvar); }); This creates an anonymous temporary function wrapper that knows about the parameter and passes it to the actual callback implementation.
To pass info via GET: header(‘Location: otherScript.php?var1=val1&var2=val2’); Session: // first script session_start(); $_SESSION[‘varName’] = ‘varVal’; header(‘Location: second_script.php’); // go to other // second script session_start(); $myVar = $_SESSION[‘varName’]; Post: Take a look at this.
#(println “Hello, world!”) -> no arguments #(println (str “Hello, ” % “!”)) -> 1 argument (% is a synonym for %1) #(println (str %1 “, ” %2 “!”)) -> 2 arguments and so on. Note that you do not have to use all %ns, the number of arguments expected is defined by the highest n. … Read more
To keep arguments ordered, I use a custom action like this: import argparse class CustomAction(argparse.Action): def __call__(self, parser, namespace, values, option_string=None): if not ‘ordered_args’ in namespace: setattr(namespace, ‘ordered_args’, []) previous = namespace.ordered_args previous.append((self.dest, values)) setattr(namespace, ‘ordered_args’, previous) parser = argparse.ArgumentParser() parser.add_argument(‘–test1’, action=CustomAction) parser.add_argument(‘–test2’, action=CustomAction) To use it, for example: >>> parser.parse_args([‘–test2’, ‘2’, ‘–test1’, ‘1’]) Namespace(ordered_args=[(‘test2’, … Read more