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What does ~~ (“double tilde”) do in Javascript?
...umbers.
Math.trunc(13.37) // 13
Math.trunc(42.84) // 42
Math.trunc(0.123) // 0
Math.trunc(-0.123) // -0
Math.trunc("-1.123")// -1
Math.trunc(NaN) // NaN
Math.trunc("foo") // NaN
Math.trunc() // NaN
The polyfill:
function trunc(x) {
return x < 0 ? Math.ceil(x) : Math....
How to calculate an angle from three points? [closed]
...t product formula:
to get the angle:
Remember that just means:
a1*b1 + a2*b2 (just 2 dimensions here...)
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edited Oct 24 '14 at 15:10
...
AngularJS $http, CORS and http authentication
...f mode_header is enabled in Apache.
For enabling headers in Ubuntu:
sudo a2enmod headers
For php server to accept request from different origin use:
Header set Access-Control-Allow-Origin *
Header set Access-Control-Allow-Methods "GET, POST, PUT, DELETE"
Header always set Access-Control-Allow-...
How to create hyperlink to call phone number on mobile devices?
...
I used:
Tel: <a href="tel:+123 123456789">+123 123456789</a>
and the result is:
Tel: +123 123456789
Where "Tel:" stands for pure text and only the number is coded and clickable.
...
What is the difference between self::$bar and static::$bar in PHP?
...which may not be what you intend:
class Foo
{
protected static $bar = 1234;
}
class Bar extends Foo
{
protected static $bar = 4321;
}
When you call a method via static, you're invoking a feature called late static bindings (introduced in PHP 5.3).
In the above scenario, using self will ...
`ui-router` $stateParams vs. $state.params
...stateParams = {};
stateParams.nextParams = $stateParams; //{item_id:123}
stateParams.next = $state.current.name;
$state.go('app.login', stateParams);
//$stateParams.nextParams on app.login is now:
//{next:'app.details', nextParams:{next:'app.details'}}
When using $state.params:
var ...
Are static fields inherited?
... total = " << total << endl;}
};
int main()
{
A a1;
A a2;
B b1;
return 0;
}
It would be:
A() total = 1
A() total = 2
A() total = 3
B() total = 4
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How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?
...;
<!-- Windows 10 compatibility -->
<supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
</application>
</compatibility>
Enable per-monitor DPI awareness in the app.config file.
Windows Forms introduces a new System.Windows.Forms.ApplicationConfigurationSe...
Unix command to find lines common in two files
...)-release
Copyright (C) 2007 Free Software Foundation, Inc.
$ cat > abc
123
567
132
$ cat > def
132
777
321
So the files abc and def have one line in common, the one with "132".
Using comm on unsorted files:
$ comm abc def
123
132
567
132
777
321
$ comm -12 abc def # No output! ...
How to remove EXIF data without recompressing the JPEG?
...e is doing other transformations with the file. Also note that "-thumbnail 123x456" is ALMOST equivalent to "-strip -resize 123x456".
– Denilson Sá Maia
Apr 17 '10 at 2:08
17
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