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How do I check if a number evaluates to infinity?
...
if (result == Number.POSITIVE_INFINITY || result == Number.NEGATIVE_INFINITY)
{
// ...
}
You could possibly use the isFinite function instead, depending on how you want to treat NaN. isFinite returns false if your number is POSITIVE_INFINITY, NEGAT...
Remove duplicate elements from array in Ruby
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Just another alternative if anyone cares.
You can also use the to_set method of an array which converts the Array into a Set and by definition, set elements are unique.
[1,2,3,4,5,5,5,6].to_set => [1,2,3,4,5,6]
...
Comparing two NumPy arrays for equality, element-wise
... or simply want to be safe: use one of the specialized functions:
np.array_equal(A,B) # test if same shape, same elements values
np.array_equiv(A,B) # test if broadcastable shape, same elements values
np.allclose(A,B,...) # test if same shape, elements have close enough values
...
How to become an OpenCart guru? [closed]
...y is accessible through Controller, Model and Views using $this->library_name. All of these can be found in the /system/library/ folder. For example, to access the current shopping cart's products, you'll need to use the Cart class, which is in /system/library/cart.php and can be accessed using $...
To underscore or to not to underscore, that is the question
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I use _ only for private fields, however I almost never have private fields due to 3.5 auto property. Generally the only time I have a private field is if I implement lazy loading on non-primitive types.
– Chr...
UICollectionView Set number of columns
...orCellWithReuseIdentifier: "Cell")
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 59
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICo...
In Flux architecture, how do you manage Store lifecycle?
...cher. Moving from one pseudo-page to another would probably involve a PAGE_UPDATE action, which would trigger the invocation of initialize(). There are details to work out around retrieving data from the local cache, retrieving data from the server, optimistic rendering and XHR error states, but t...
Detect blocked popup in Chrome
...code I use for cross-browser detection, without the Chrome part.
function _hasPopupBlocker(poppedWindow) {
var result = false;
try {
if (typeof poppedWindow == 'undefined') {
// Safari with popup blocker... leaves the popup window handle undefined
result = t...
Structure padding and packing
...It inserts the following "gaps" into your first structure:
struct mystruct_A {
char a;
char gap_0[3]; /* inserted by compiler: for alignment of b */
int b;
char c;
char gap_1[3]; /* -"-: for alignment of the whole struct in an array */
} x;
Packing, on the other hand prevents ...
What's the difference between utf8_general_ci and utf8_unicode_ci?
Between utf8_general_ci and utf8_unicode_ci , are there any differences in terms of performance?
8 Answers
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