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Unique ways to use the Null Coalescing operator [closed]
...he function close in cache. On the other hand: en.wikipedia.org/wiki/Global_value_numbering
– TinyTimZamboni
Feb 17 '16 at 18:24
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show 1 mo...
autolayout - make height of view relative to half superview height
...youtConstraint
constraintsWithVisualFormat:@"V:[topLayoutGuide]-0-[_view1]-0-[_view2(==_view1)]-0-[bottomLayoutGuide]"
options:0
metrics:nil
views:viewsDict]];
...
What is a “context bound” in Scala?
... Iterable[T]) =
xs zip ys map { t => implicitly[Numeric[T]].times(t._1, t._2) }
or
def **[T : Numeric](xs: Iterable[T], ys: Iterable[T]) =
xs zip ys map { t => context[T]().times(t._1, t._2) }
share
...
jQuery UI Sortable, then write order into a database
...elements' positions accordingly.
For example, in PHP:
$i = 0;
foreach ($_POST['item'] as $value) {
// Execute statement:
// UPDATE [Table] SET [Position] = $i WHERE [EntityId] = $value
$i++;
}
Example on jsFiddle.
...
How does C compute sin() and other math functions?
...r than the fsin assembly instruction. Source code: sysdeps/ieee754/dbl-64/s_sin.c, look for __sin (double x).
This code is very complex. No one software algorithm is as fast as possible and also accurate over the whole range of x values, so the library implements several different algorithms, and i...
Set the maximum character length of a UITextField
...th] - range.length;
return newLength <= 25;
}
Swift
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let currentCharacterCount = textField.text?.count ?? 0
if range.length + range.location > curre...
what is the difference between 'transform' and 'fit_transform' in sklearn
In the sklearn-python toolbox, there are two functions transform and fit_transform about sklearn.decomposition.RandomizedPCA . The description of two functions are as follows
...
How do I write the 'cd' command in a makefile?
...
It is actually executing the command, changing the directory to some_directory, however, this is performed in a sub-process shell, and affects neither make nor the shell you're working from.
If you're looking to perform more tasks within some_directory, you need to add a semi-colon and appen...
How to force a web browser NOT to cache images
...ile.jpg&some-random-number-262376" />
Script:
// PHP
if( isset( $_GET['img'] ) && is_file( IMG_PATH . $_GET['img'] ) ) {
// read contents
$f = open( IMG_PATH . $_GET['img'] );
$img = $f.read();
$f.close();
// no-cache headers - complete set
// these copied from [php.n...
Oracle SQL: Update a table with data from another table
...wer with 'in' clause that allows for multiple keys for the join:
update fp_active set STATE='E',
LAST_DATE_MAJ = sysdate where (client,code) in (select (client,code) from fp_detail
where valid = 1) ...
The beef is in having the columns that you want to use as the key in parentheses in the w...