I stumbled onto this neat shortcut for converting a DOM NodeList into a regular array, but I must admit, I don’t completely understand how it works: [].slice.call(document.querySelectorAll(‘a’), 0) So it starts with an empty array [], then slice is used to convert the result of call to a new array yeah? The bit I don’t … Read more
If I call a command using Kernel#system in Ruby, how do I get its output? system(“ls”) 16 Answers 16
I’d like to call a function using an array as parameters: const x = [‘p0’, ‘p1’, ‘p2’]; call_me(x[0], x[1], x[2]); // I don’t like it function call_me (param0, param1, param2 ) { // … } Is there a better way of passing the contents of x into call_me()? 12 Answers 12
I have this code which calculates the distance between two coordinates. The two functions are both within the same class. However, how do I call the function distToPoint in the function isNear? class Coordinates: def distToPoint(self, p): “”” Use pythagoras to find distance (a^2 = b^2 + c^2) “”” … def isNear(self, p): distToPoint(self, p) … Read more
I need to know when the finalize() method is called in the JVM. I created a test class which writes into a file when the finalize() method is called by overriding it. It is not executed. Can anybody tell me the reason why it is not executing? 18 Answers 18
In general it’s best not to rely on finalize() to do any cleaning up etc. According to the Javadoc (which it would be worth reading), it is: Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. As Joachim pointed out, this may never happen in the life … Read more
Suposse you have Class1 public class Class1 { //Your class code above } Class2 and then you can use Class2 in different ways. Class Field public class Class1{ private Class2 class2 = new Class2(); } Method field public class Class1 { public void loginAs(String username, String password) { Class2 class2 = new Class2(); class2.invokeSomeMethod(); //your … Read more
