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Finding all objects that have a given property inside a collection [duplicate]
...t;Cat> {
public boolean check(Cat cat) {
return (cat.age == 3); // or whatever, implement your comparison here
}
}
// put this in some class
public static <T> Collection<T> findAll(Collection<T> coll, Checker<T> chk) {
LinkedList<T> l = new Linke...
Why implement interface explicitly?
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answered Nov 5 '10 at 3:11
IainIain
9,68933 gold badges3232 silver badges2929 bronze badges
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How to use 'find' to search for files created on a specific date? [closed]
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328
As pointed out by Max, you can't, but checking files modified or accessed is not all that hard...
How to save a list as numpy array in python?
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163
First of all, I'd recommend you to go through NumPy's Quickstart tutorial, which will probably ...
Integer to hex string in C++
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edited Aug 28 '13 at 14:40
user283145
answered Feb 24 '11 at 5:30
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Detect when a window is resized using JavaScript ?
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edited Jun 8 '10 at 13:13
answered Jun 8 '10 at 10:21
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When is TCP option SO_LINGER (0) required?
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edited Apr 30 '15 at 11:18
OJ.
26.7k55 gold badges5252 silver badges6969 bronze badges
an...
Ruby on Rails generates model field:type - what are the options for field:type?
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Dennis
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answered Dec 8 '10 at 5:02
Paul SchreiberP...
How to count TRUE values in a logical vector
...m(z) # gives you NA
table(z)["TRUE"] # gives you 1
length(z[z == TRUE]) # f3lix answer, gives you 2 (because NA indexing returns values)
So I think the safest is to use na.rm = TRUE:
sum(z, na.rm = TRUE) # best way to count TRUE values
(which gives 1). I think that table solution is less effici...
What does void* mean and how to use it?
...elements of the array. It gets called like so:
int iArr[10];
double dArr[30];
long lArr[50];
...
qsort(iArr, sizeof iArr/sizeof iArr[0], sizeof iArr[0], compareInt);
qsort(dArr, sizeof dArr/sizeof dArr[0], sizeof dArr[0], compareDouble);
qsort(lArr, sizeof lArr/sizeof lArr[0], sizeof lArr[0], comp...