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Converting RGB to grayscale/intensity
...color science, the common RGB values, as in html rgb( 10%, 20%, 30% ),
are called "nonlinear" or
Gamma corrected.
"Linear" values are defined as
Rlin = R^gamma, Glin = G^gamma, Blin = B^gamma
where gamma is 2.2 for many PCs.
The usual R G B are sometimes written as R' G' B' (R' = Rlin ^ (1/gamm...
Convert nested Python dict to object?
...t; s.a
1
>>> s.b
{'c': 2}
>>> s.c
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'MyStruct' object has no attribute 'c'
>>> s.d
['hi']
The alternative (original answer contents) is:
class Struct:
def __init__(sel...
Math functions in AngularJS bindings
...
Using functions in bindings will make the function to call in each scope's update and will use too much resources.
– desmati
Sep 20 '16 at 22:09
...
What does OSGi solve?
...ication happens over the network which is very expensive compared to local calls. Managing versions in SOA and microservices is also quite a nightmare. Calling an OSGi service in comparison is as cheap as any java method call.
– Christian Schneider
Nov 27 '18 a...
How to test if a string is JSON or not?
I have a simple AJAX call, and the server will return either a JSON string with useful data or an error message string produced by the PHP function mysql_error() . How can I test whether this data is a JSON string or the error message.
...
How to define static property in TypeScript interface
...ace Date {
MinValue: Date;
}
Date.prototype.MinValue = new Date(0);
Called using:
var x = new Date();
console.log(x.MinValue);
And if you want to make it available without an instance, you also can... but it is a bit fussy.
interface DateStatic extends Date {
MinValue: Date;
}
Date['...
No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '…' is therefor
...end it through to the remote server.
First in your JavaScript, do an Ajax call to your own server, something like:
$.ajax({
url: yourserver.com/controller/proxy.php,
async:false,
type: "POST",
dataType: "json",
data: data,
success: function (result) {
JSON.parse(res...
bootstrap button shows blue outline when clicked
...
May be your properties are getting overridden.
Try attaching !important to your code along with the :active .
.btn:focus,.btn:active {
outline: none !important;
box-shadow: none;
}
Also add box-shadow because otherwise you will still see the shadow around b...
Fastest way to iterate over all the chars in a String
... is sufficiently optimized to inline and streamline any 'string.charAt(n)' calls.
THIRD UPDATE: As of 2020-09-07, on my Ryzen 1950-X 16 core and source 1.14, 'charAt1' is 9 times slower than field access and 'charAt2' is 4 times slower than field access. Field access is back as the clear winner. Not...
How to debug Angular JavaScript Code
...pe.bla and scope.$eval('bla') is the former does not consider the prototypically inherited values. Use the snippet below to get the whole picture (you cannot directly change the value, but you can use $eval anyway!)
scopeCopy = function (scope) {
var a = {};
for (x in scope){
if (...