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Time complexity of Sieve of Eratosthenes algorithm
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answered Apr 6 '10 at 5:17
ShreevatsaRShreevatsaR
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Get underlying NSData from UIImage
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NSData *imageData = UIImageJPEGRepresentation(image, 0.7); // 0.7 is JPG quality
or
NSData *imageData = UIImagePNGRepresentation(image);
Depending if you want your data in PNG format or JPG format.
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Get column index from column name in python pandas
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answered Oct 23 '12 at 0:06
DSMDSM
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Creating Multifield Indexes in Mongoose / MongoDB
...d2: ?
– Damon Yuan
Oct 26 '15 at 5:04
9
@DamonYuan They set the sort order of the fields in the ...
Split a string on whitespace in Go?
...en(words)) // [one two three four] 4
DEMO: http://play.golang.org/p/et97S90cIH
From the docs:
func Fields(s string) []string
Fields splits the string s around each instance of one or more consecutive white space characters, returning an array of substrings of s or an empty list if s contains only ...
Adding data attribute to DOM
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edited Sep 20 '17 at 6:46
ankit suthar
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jQuery / Javascript - How do I convert a pixel value (20px) to a number value (20)
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No jQuery required for this, Plain Ol' JS (tm) will do ya,
parseInt(a, 10);
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Remove empty array elements
...e removed. So if you need to preserve elements that are i.e. exact string '0', you will need a custom callback:
// PHP 7.4 and later
print_r(array_filter($linksArray, fn($value) => !is_null($value) && $value !== ''));
// PHP 5.3 and later
print_r(array_filter($linksArray, function($valu...
UITableViewCell subview disappears when cell is selected
...enting a color-chooser table view where the user can select amongst, say, 10 colors (depends on the product). The user can also select other options (like hard drive capacity, ...).
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HashSet versus Dictionary w.r.t searching time to find if an item exists
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HashSet vs List vs Dictionary performance test, taken from here.
Add 1000000 objects (without checking duplicates)
Contains check for half the objects of a collection of 10000
Remove half the objects of a collection of 10000
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