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How to check if a value exists in an array in Ruby
...reverse method include? exists, for all Enumerables including Array, Hash, Set, Range:
['Cat', 'Dog', 'Bird'].include?('Unicorn') # => false
Note that if you have many values in your array, they will all be checked one after the other (i.e. O(n)), while that lookup for a hash will be constan...
Fastest way to convert string to integer in PHP
...
I've just set up a quick benchmarking exercise:
Function time to run 1 million iterations
--------------------------------------------
(int) "123": 0.55029
intval("123"): 1.0115 (183%)
(int) "...
Impossible to make a cached thread pool with a size limit?
...
This does work, Matt. You set the core size to 0, that's why you only had 1 thread. The trick here is to set the core size to the max size.
– T-Gergely
Apr 19 '16 at 12:18
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Simulating ENTER keypress in bash script
...etween single and double quotes. My shell is just a regular bash, is there settings that would regulate behavior of such basic functionality?
– Marcin
Jun 7 '11 at 12:09
...
Difference between Array and List in scala
... editor after snippets, if snippets enabled
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Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
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How do I make a dotted/dashed line in Android?
...e found the solution here : stackoverflow.com/questions/10843402/… Just set layer type to software : android:layerType="software"
– Dante
Apr 23 '13 at 11:50
7
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Initializing a list to a known number of elements in Python [duplicate]
...
10 loops, best of 3: 177 ms per loop
Comparison to numpy
For huge data set numpy or other optimized libraries are much faster:
from numpy import ndarray, zeros
%timeit empty((N,))
1000000 loops, best of 3: 788 ns per loop
%timeit zeros((N,))
100 loops, best of 3: 3.56 ms per loop
...
Is there a way to instantiate objects from a string holding their class name?
...ing which probably makes sense to use here is shared_ptr.
If you have a set of unrelated types that have no common base-class, you can give the function pointer a return type of boost::variant<A, B, C, D, ...> instead. Like if you have a class Foo, Bar and Baz, it looks like this:
typedef ...
Choose File Dialog [closed]
...his);
switch(id) {
case DIALOG_LOAD_FILE:
builder.setTitle("Choose your file");
if(mFileList == null) {
Log.e(TAG, "Showing file picker before loading the file list");
dialog = builder.create();
return dialog;
...