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What is the difference between Serializable and Externalizable in Java?
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To add to the other answers, by implementating java.io.Serializable, you get "automatic" serialization capability for objects of your class. No need to implement any other logic, it'll just work. The Java runtime will use reflection to figure out how to ...
receiving error: 'Error: SSL Error: SELF_SIGNED_CERT_IN_CHAIN' while using npm
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My issue was caused by a proxy that I'm behind, "npm config set ca null" and 'npm config set ca ""' still gave me the same error, but removing SSL worked perfectly. Sometimes good practice isn't as important as what actually works.
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Nullable type issue with ?: Conditional Operator
...he compiler tries to guess the resulting type of the ternary operation not by looking at the variable to which it is assigned, but by looking at the operands instead. It finds <null> and DateTime and instead of finding the common ancestor type, it just tries to find a conversion between each o...
Difference between two dates in Python
... Isn't the if in the diff_dates function completely unnecessary? By the definition of the absolute value, abs(date1-date2) will always be equal to abs(date2-date1).
– Blckknght
Jun 30 '14 at 7:17
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How do browsers pause/change Javascript when tab or window is not active?
...: This test is quite CPU intensive. requestAnimationFrame is not supported by IE 9- and Opera 12-.
The test logs the actual time it takes for a setInterval and requestAnimationFrame to run in different browsers, and gives you the results in the form of a distribution. You can change the number of m...
Where do I use delegates? [closed]
...da expressions mostly results in anoymous methods which will be pointed to by... a delegate.
– Martin Mulder
Apr 22 '15 at 8:36
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How can sbt pull dependency artifacts from git?
...ndency with the dependsOn operator, and you can reference a Github project by its URI, for example RootProject(uri("git://github.com/dragos/dupcheck.git")). Alternatively, you can git clone the project, and then reference your local copy with RootProject(file(...)). See "Full Configuration" on the S...
iOS Image Orientation has Strange Behavior
...metadata specifies the orientation of the image which is generally ignored by other OS but Mac. Most of images taken are having their meta data property set to right angle. So Mac shows it 90 degree rotated manner. You can see the same image in proper way in windows OS.
For more detail read this an...
Button Click event fires when pressing Enter key in different input (no forms)
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I had the same problem and solved it by adding type="button" attribute to the <button> element, by which IE thinks the button as a simple button instead of a submit button (which is default behavior of a <button> element).
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What is the difference between a heuristic and an algorithm?
... time. In such cases you often can get a not too bad solution much faster, by applying some arbitrary choices (educated guesses): that's a heuristic.
A heuristic is still a kind of an algorithm, but one that will not explore all possible states of the problem, or will begin by exploring the most li...