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Why do some claim that Java's implementation of generics is bad?
...aints of Java/it's generics. Enums have a static values() method giving an array of their elements typed as the enum, not Enum, and that type is determined by the generic parameter, meaning you want Enum<T>. Of course, that typing only makes sense in the context of an enumerated type, and all ...
What are the special dollar sign shell variables?
...
$1, $2, $3, ... are the positional parameters.
"$@" is an array-like construct of all positional parameters, {$1, $2, $3 ...}.
"$*" is the IFS expansion of all positional parameters, $1 $2 $3 ....
$# is the number of positional parameters.
$- current options set for the shell.
$$ pi...
Difference between Bridge pattern and Adapter pattern
...te meet the interface you need it to. For instance, we have a SuperWeaponsArray which can control a fine array of doomsday devices.
public class SuperWeaponsArray {
/*...*/
public void destroyWorld() {
for (Weapon w : armedWeapons) {
w.fire();
}
}
}
Great. Except we reali...
Fixing Sublime Text 2 line endings?
... "keys": ["ctrl+alt+l"],
"command": "line_endings_unify"
},
to the User array (right pane, after the opening [) in Preferences -> KeyBindings + press Ctrl+Alt+L.
As mentioned in another answer:
The Carriage Return (CR) character (0x0D, \r) [...] Early Macintosh operating systems (OS-9...
What actually causes a Stack Overflow error? [duplicate]
... error. Just like it would do if you were trying to write at index N of an array of length N. No memory corruption can happen. The stack can not write into the heap.
A StackOverflowError is to the stack what an OutOfMemoryError is to the heap: it simply signals that there is no more memory availabl...
Best way of invoking getter by reflection
...id sortMethods() {
methods = Student.class.getMethods();
Arrays.sort(methods, new Comparator<Method>() {
public int compare(Method o1, Method o2) {
Order or1 = o1.getAnnotation(Order.class);
Order or2 = o2.getAnnotation(Order.class)...
Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
...import numpy as np
...: import pandas as pd
...:
...: keys = np.array([
...: ['A', 'B'],
...: ['A', 'B'],
...: ['A', 'B'],
...: ['A', 'B'],
...: ['C', 'D'],
...: ['C', 'D'],
...: ['C', 'D'],
...: ['E',...
Convert data.frame column format from character to factor
... Thanks! but I have another problem. I have the name of each column in an array of characters col_names[]. How can I use the above command (neither mydf$col_names[i] nor mydf[,col_names[i]] doesn't work.)
– Rasoul
Feb 12 '12 at 18:41
...
How to enumerate an enum with String type?
...od point right at the end about making each enum value is in the allValues array with a unit test. However, I can still see someone adding more elements, but not enforcing them in the unit test which still leaves us back at the beginning, not knowing for sure that all enum values are kept in allValu...
Why use double indirection? or Why use pointers to pointers?
...ters use references of references, while arr[a][b][c] is stored as a usual array in row major order.
– MCCCS
Jun 23 '18 at 9:50
...