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How do you convert a byte array to a hexadecimal string, and vice versa?
... should not be added anywhere - to add one would be making an assumption about invalid data that is potentially dangerous. If anything, the StringToByteArray method should throw a FormatException if the hex string contains an odd number of characters.
– David Boike
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How does Access-Control-Allow-Origin header work?
...n: http://siteA.com
Modern browsers will not block cross-domain requests outright. If Site A requests a page from Site B, the browser will actually fetch the requested page on the network level and check if the response headers list Site A as a permitted requester domain. If Site B has not indic...
How do I copy to the clipboard in JavaScript?
...er HTTPS.
In Chrome 66 pages in active tabs can write to the clipboard without a permissions prompt.
document.execCommand('copy')
Most browsers support this as of ~April 2015 (see Browser Support below).
Access is synchronous, i.e. stops JavaScript in the page until complete including displaying ...
How do I put a bunch of uncommitted changes aside while working on something else
...tionally, the --all is no longer required and mercurial will in fact freak out over it.
Patch queue the items using mq. This isn't too dissimilar to shelve in some respects, but behaves differently. The end result is the same, changes are removed and can be optionally re-applied later. When pushed,...
How can I access and process nested objects, arrays or JSON?
...me / index as variable
const x = 5;
const value = arr[x];
Wait... what about JSON?
JSON is a textual representation of data, just like XML, YAML, CSV, and others. To work with such data, it first has to be converted to JavaScript data types, i.e. arrays and objects (and how to work with those was...
@property retain, assign, copy, nonatomic in Objective-C
...
Before you know about the attributes of @property, you should know what is the use of @property.
@property offers a way to define the information that a class is intended to encapsulate.
If you declare an object/variable using @property, the...
How to validate an email address using a regular expression?
...cases domain names, IP addresses, bad ones, and account names with and without quotes.
Correcting the 00 bug in the IP pattern, we obtain a working and fairly fast regex. (Scrape the rendered version, not the markdown, for actual code.)
(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'...
Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
...s illustrated by the green color, it's now possible to reuse Library C without dragging along any unwanted dependencies.
However, all that said, with many DI Containers, you don't have to add hard references to all required libraries. Instead, you can use late binding either in the form of conventi...
Android Camera Preview Stretched
...review android:id="@+id/camera_preview" android:layout_width="match_parent" android:layout_height="match_parent" />
– fish40
Jul 14 '14 at 12:51
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How are strings passed in .NET?
...the reference itself is passed by value. Any time you pass a parameter without the ref keyword (not counting out parameters), you've passed something by value.
So that must mean you're...passing a reference by value. Since it's a reference type, only the reference was copied onto the stack. But wha...