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Why does appending “” to a String save memory?
...string() gives a window onto an existing String - or rather, the character array underlying the original String. Hence it will consume the same memory as the original String. This can be advantageous in some circumstances, but problematic if you want to get a substring and dispose of the original St...
Add swipe to delete UITableViewCell
...ngStyle.Delete) {
// handle delete (by removing the data from your array and updating the tableview)
}
}
Swift 3.0:
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
override func tableView(_ tableView: UITableView, co...
Get Image Height and Width as integer values?
...
getimagesize() returns an array containing the image properties.
list($width, $height) = getimagesize("path/to/image.jpg");
to just get the width and height or
list($width, $height, $type, $attr)
to get some more information.
...
Why is MATLAB so fast in matrix multiplication?
...Toolbox on a machine with a Tesla C2070:
>> A = rand(1024); gA = gpuArray(A);
% warm up by executing the operations a couple of times, and then:
>> tic, C = A * A; toc
Elapsed time is 0.075396 seconds.
>> tic, gC = gA * gA; toc
Elapsed time is 0.008621 seconds.
MATLAB uses highl...
how to delete all cookies of my website in php
...he HTTP_COOKIE value would be any better than looping through the $_COOKIE array. Do you have any reason for that? To me it only looks like more (double) work for the parser.
– poke
Feb 22 '10 at 12:24
...
Why would $_FILES be empty when uploading files to PHP?
...upload any file from a form, it seems to upload, but in PHP, the $_FILES array is empty. There is no file in the c:\wamp\tmp folder. I have configured php.ini to allow file uploads and such. The tmp folder has read/write privileges for the current user. I'm stumped.
...
Get all column names of a DataTable into string array using (LINQ/Predicate)
... .Select(x => x.ColumnName)
.ToArray();
or in LINQ Query syntax:
string[] columnNames = (from dc in dt.Columns.Cast<DataColumn>()
select dc.ColumnName).ToArray();
Cast is required, because Columns is of type DataColum...
Storing Data in MySQL as JSON
...t you are doing. In fact I've used it a lot for temporary cache storage of array data and some other situations where you achieve a faster result and less code. Many projects in reality have some mixed features.
– Heroselohim
Oct 5 '15 at 21:02
...
How to return 2 values from a Java method?
...
Instead of returning an array that contains the two values or using a generic Pair class, consider creating a class that represents the result that you want to return, and return an instance of that class. Give the class a meaningful name. The benef...
In c# is there a method to find the max of 3 numbers?
... MoreMath.Max(1, 2, 3) or MoreMath.Max(1, 2, 3, 4) without the overhead of array creation, but still write MoreMath.Max(1, 2, 3, 4, 5, 6) for nice readable and consistent code when you don't mind the overhead.
I personally find that more readable than the explicit array creation of the LINQ approac...