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What is the use of making constructor private in a class?
... @Will: Not if you use reflection. Declaring constructors private is intended to prevent instantiation (barring reflection), but preventing subclassing is a side effect, not the intent. The appropriate tool for this is declaring the class final. This is what Sun did for the String class, and...
When to use LinkedList over ArrayList in Java?
...
LinkedList and ArrayList are two different implementations of the List interface. LinkedList implements it with a doubly-linked list. ArrayList implements it with a dynamically re-sizing array.
As with standard linked list and array operations, the various methods will have different algorithmi...
Optional Parameters in Go?
...ctually receives a slice of whatever type you specify.
func foo(params ...int) {
fmt.Println(len(params))
}
func main() {
foo()
foo(1)
foo(1,2,3)
}
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...
MySQL Creating tables with Foreign Keys giving errno: 150
... tables references each other, you must create one table without FK constraints, then create the second table, then add the FK constraint to the first table with ALTER TABLE.
The two tables must both support foreign key constraints, i.e. ENGINE=InnoDB. Other storage engines silently ignore foreign ...
What's the difference between a continuation and a callback?
...urrent-continuation of the first callcc contains another callcc it must be converted to continuation passing style:
function cc(x_squared) {
square(y, function cc(y_squared) {
add(x_squared, y_squared, cont);
});
}
So essentially callcc logically converts the entire function body ...
ReadOnlyCollection or IEnumerable for exposing member collections?
Is there any reason to expose an internal collection as a ReadOnlyCollection rather than an IEnumerable if the calling code only iterates over the collection?
...
How do I use DateTime.TryParse with a Nullable?
... to use the DateTime.TryParse method to get the datetime value of a string into a Nullable. But when I try this:
9 Answers...
How do I obtain the frequencies of each value in an FFT?
...ed to thank you... so thank you! Whenever I have a debate with someone on interpreting what the each point on the horizontal axis of the FFT is, I just point them to this link.
– rayryeng
Jan 30 '15 at 21:21
...
In Intellij, how do I toggle between camel case and underscore spaced?
...p the plugin menu, then press:
5 - To snake_case (or to camelCase) which converts to history_of_present_illness
6 - To hyphen-case (or to snake_case) which converts to history-of-present-illness
To make this easier, you could set up a shortcut at File | Settings | Keymap.
A quick search of th...
Clearing a string buffer/builder after loop
... the delete method as follows:
StringBuffer sb = new StringBuffer();
for (int n = 0; n < 10; n++) {
sb.append("a");
// This will clear the buffer
sb.delete(0, sb.length());
}
Another option (bit cleaner) uses setLength(int len):
sb.setLength(0);
See Javadoc for more info:
...