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User recognition without cookies or local storage
...ng Random Data. You can't store the user's identity reliably because:
Cookies Can be deleted
IP address Can change
Browser Can Change
Browser Cache may be deleted
A Java Applet or Com Object would have been an easy solution using a hash of hardware information, but these days people are so secu...
Is it possible to Pivot data using LINQ?
...
Something like this?
List<CustData> myList = GetCustData();
var query = myList
.GroupBy(c => c.CustId)
.Select(g => new {
CustId = g.Key,
Jan = g.Where(c => c.OrderDate.Month == 1).Sum(c => c.Q...
UITableView - scroll to the top
...rollView, so you can also use:
[mainTableView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];
Or
[mainTableView setContentOffset:CGPointZero animated:YES];
And in Swift:
mainTableView.setContentOffset(CGPointZero, animated:true)
And in Swift 3 & above:
mainTableView.setConten...
Why does PHP consider 0 to be equal to a string?
...
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
answered Jul 27 '11 at 10:49
NanneNanne
...
How to check if PHP array is associative or sequential?
...any built in functions. Can anyone recommend a fairly efficient way to check if an array contains only numeric keys?
56 Ans...
Creating dataframe from a dictionary where entries have different lengths
Say I have a dictionary with 10 key-value pairs. Each entry holds a numpy array. However, the length of the array is not the same for all of them.
...
How do I sort a dictionary by value?
...ring field and a numeric field. The string field is unique, so that is the key of the dictionary.
34 Answers
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How can I declare and define multiple variables in one line using C++?
...
Chris Eberle
43.7k1111 gold badges7474 silver badges110110 bronze badges
answered Jul 27 '11 at 1:12
JoshJosh
...
Are list-comprehensions and functional functions faster than “for loops”?
In terms of performance in Python, is a list-comprehension, or functions like map() , filter() and reduce() faster than a for loop? Why, technically, they run in a C speed , while the for loop runs in the python virtual machine speed ?.
...
In Python, how do I read the exif data for an image?
...he dictionary indexed by the actual EXIF tag name strings, try something like:
import PIL.ExifTags
exif = {
PIL.ExifTags.TAGS[k]: v
for k, v in img._getexif().items()
if k in PIL.ExifTags.TAGS
}
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