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Algorithm to detect intersection of two rectangles?
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The standard method would be to do the separating axis test (do a google search on that).
In short:
Two objects don't intersect if you can find a line that separates the two objects. e.g. the objects / all points of an object are on different sides of the line.
The fun thing...
java get file size efficiently
...with the code below:
For runs = 1 and iterations = 1 the URL method is fastest most times followed by channel. I run this with some pause fresh about 10 times. So for one time access, using the URL is the fastest way I can think of:
LENGTH sum: 10626, per Iteration: 10626.0
CHANNEL sum: 5535, per...
How do you append to an already existing string?
I want append to a string so that every time I loop over it will add say "test" to the string.
7 Answers
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Most efficient way to make the first character of a String lower case?
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I tested the promising approaches using JMH. Full benchmark code.
Assumption during the tests (to avoid checking the corner cases every time): the input String length is always greater than 1.
Results
Benchmark Mod...
Does use of final keyword in Java improve the performance?
...le below are concatenated statically (at compile time).
public class FinalTest {
public static final int N_ITERATIONS = 1000000;
public static String testFinal() {
final String a = "a";
final String b = "b";
return a + b;
}
public static String testNonFina...
pytest: assert almost equal
How to do assert almost equal with py.test for floats without resorting to something like:
7 Answers
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How do I check if there are duplicates in a flat list?
... to get O(N logN) if they're at least comparable. But you need to know or test the characteristics of the items (hashable or not, comparable or not) to get the best performance you can -- O(N) for hashables, O(N log N) for non-hashable comparables, otherwise it's down to O(N squared) and there's no...
Count the number of occurrences of a string in a VARCHAR field?
...able(TITLE VARCHAR(100), DESCRIPTION VARCHAR(100))
INSERT INTO @t SELECT 'test1', 'value blah blah value'
INSERT INTO @t SELECT 'test2','value test'
INSERT INTO @t SELECT 'test3','test test test'
INSERT INTO @t SELECT 'test4','valuevaluevaluevaluevalue'
SELECT TITLE,DESCRIPTION,Count = (LEN(D...
How do I check if file exists in Makefile so I can delete it?
...ng on one line with the && operator in bash.
Then you can use a test command to test if the file does exist, e.g.:
test -f myApp && echo File does exist
-f file True if file exists and is a regular file.
-s file True if file exists and has a size greater tha...
How to select option in drop down protractorjs e2e tests
I am trying to select an option from a drop down for the angular e2e tests using protractor.
31 Answers
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