Finding # occurrences of a character in a string in Ruby
If you just want the number of a’s: puts “Melanie is a noob”.count(‘a’) #=> 2 Docs for more details.
methods
Naming conventions for Java methods that return boolean
The convention is to ask a question in the name. Here are a few examples that can be found in the JDK: isEmpty() hasChildren() That way, the names are read like they would have a question mark on the end. Is the Collection empty? Does this Node have children? And, then, true means yes, and … Read more
Making java method arguments as final
As a formal method parameter is a local variable, you can access them from inner anonymous classes only if they are declared as final. This saves you from declaring another local final variable in the method body: void m(final int param) { new Thread(new Runnable() { public void run() { System.err.println(param); } }).start(); }
How to check whether a method exists in Python?
Check if class has such method? hasattr(Dynamo, key) and callable(getattr(Dynamo, key)) or hasattr(Dynamo, ‘mymethod’) and callable(getattr(Dynamo, ‘mymethod’)) You can use self.__class__ instead of Dynamo
Why are C# interface methods not declared abstract or virtual?
For the interface, the addition of the abstract, or even the public keywords would be redundant, so you omit them: interface MyInterface { void Method(); } In the CIL, the method is marked virtual and abstract. (Note that Java allows interface members to be declared public abstract). For the implementing class, there are some options: … Read more
Javascript dynamically invoke object method from string
if the name of the property is stored in a variable, use [] foo[method]();
Declaration of Methods should be Compatible with Parent Methods in PHP
childClass::customMethod() has different arguments, or a different access level (public/private/protected) than parentClass::customMethod().
Calling a function within a Class method?
Try this one: class test { public function newTest(){ $this->bigTest(); $this->smallTest(); } private function bigTest(){ //Big Test Here } private function smallTest(){ //Small Test Here } public function scoreTest(){ //Scoring code here; } } $testObject = new test(); $testObject->newTest(); $testObject->scoreTest();
What’s wrong with using $_REQUEST[]?
There’s absolutely nothing wrong with taking input from both $_GET and $_POST in a combined way. In fact that’s what you almost always want to do: for a plain idempotent request usually submitted via GET, there’s the possibility the amount of data you want won’t fit in a URL so it has be mutated to … Read more
Android: How can I pass parameters to AsyncTask’s onPreExecute()?
You can override the constructor. Something like: private class MyAsyncTask extends AsyncTask<Void, Void, Void> { public MyAsyncTask(boolean showLoading) { super(); // do stuff } // doInBackground() et al. } Then, when calling the task, do something like: new MyAsyncTask(true).execute(maybe_other_params); Edit: this is more useful than creating member variables because it simplifies the task invocation. Compare … Read more