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How to Store Historical Data
...directly within an operational system will make your application much more complex than it would otherwise be. Generally, I would not recommend doing it unless you have a hard requirement to manipulate historical versions of a record within the system.
If you look closely, most requirements for ...
When should an IllegalArgumentException be thrown?
...d in the JDK libraries, I would say:
It seems like a defensive measure to complain about obviously bad input before the input can get into the works and cause something to fail halfway through with a nonsensical error message.
It's used for cases where it would be too annoying to throw a checked e...
What is the basic difference between the Factory and Abstract Factory Design Patterns? [closed]
...need to have factory of IFruitFactory. And as I already mentioned, this is completely incorrect, and is just a result of the confusion about patterns. My answer below clarifies - there is Abstract Factory pattern, then there is Factory Method pattern, and then there are confused people who think Abs...
How to bind to a PasswordBox in MVVM
I have come across a problem with binding to a PasswordBox . It seems it's a security risk but I am using the MVVM pattern so I wish to bypass this. I found some interesting code here (has anyone used this or something similar?)
...
How to access remote server with local phpMyAdmin client?
...ere is a remote server and I have phpMyAdmin client installed localy on my computer. How can I access this server and manage it via phpMyAdmin client? Is that possible?
...
Passing enum or object through an intent (the best solution)
... use of extension functions and reified types (which retains the type when compiling).
inline fun <reified T : Enum<T>> Intent.putExtra(victim: T): Intent =
putExtra(T::class.java.name, victim.ordinal)
inline fun <reified T: Enum<T>> Intent.getEnumExtra(): T? =
getI...
Warn user before leaving web page with unsaved changes
...d anything on your forms. One solution is to use the beforeunload event in combination with a "dirty" flag, which only triggers the prompt if it's really relevant.
var isDirty = function() { return false; }
window.onload = function() {
window.addEventListener("beforeunload", function (e) {
...
Spark java.lang.OutOfMemoryError: Java heap space
... or more than an MB, you may have a memory leak. See https://stackoverflow.com/a/25270600/1586965
Related to above; use broadcast variables if you really do need large objects.
If you are caching large RDDs and can sacrifice some access time consider serialising the RDD http://spark.apache.org/docs/...
Compiler Ambiguous invocation error - anonymous method and method group with Func or Action
...that this line:
An implicit conversion exists from a method group to a compatible delegate type
(emphasis added) is deeply misleading and unfortunate. I'll have a talk with Mads about getting the word "compatible" removed here.
The reason this is misleading and unfortunate is because it lo...
What is your naming convention for stored procedures? [closed]
...GetProductDetail. However now the database is at 700 procedures plus, it becomes a lot harder to find all procedures on a specific object. For example i now have to search 50 odd Add procedures for the Product add, and 50 odd for the Get etc.
Because of this in my new application I'm planning on gr...