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Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
... The payment gateway vendors provide a way to talk to the Internet Gateway API that you will communicate with. Most vendors provide HTTP or TCP/IP communication with their API. They will process the credit card information on your behalf. Two vendors are Authorize.Net and PayFlow Pro. The link I...
Android: Difference between Parcelable and Serializable?
...pose serialization mechanism. This class (and the corresponding Parcelable API for placing arbitrary objects into a Parcel) is designed as a high-performance IPC transport. As such, it is not appropriate to place any Parcel data in to persistent storage: changes in the underlying implementation of a...
Understanding implicit in Scala
...
Actions are explained on this page from the Play documentation (see also API docs). You are using
apply(block: (Request[AnyContent]) ⇒ Result): Action[AnyContent]
on the Action object (which is the companion to the trait of the same name).
So we need to supply a Function as the argument, wh...
Where should I put tags in HTML markup?
...using external scripts that support callbacks. Many third party JavaScript APIs now support non-blocking execution. Here is an example of loading the Google Maps API asynchronously.
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When to use the different log levels
... be immediately visible on a status console.
warn:
Use of deprecated APIs, poor use of API, 'almost' errors, other runtime situations that are undesirable or unexpected, but not necessarily "wrong". Expect these to be immediately visible on a status console.
info:
Interesting runtime eve...
Using Java 8's Optional with Stream::flatMap
...:stream)
.findFirst();
Java 8
Yes, this was a small hole in the API, in that it's somewhat inconvenient to turn an Optional<T> into a zero-or-one length Stream<T>. You could do this:
Optional<Other> result =
things.stream()
.map(this::resolve)
.fl...
If strings are immutable in .NET, then why does Substring take O(n) time?
... and allows for the pointer to be passed in a P/Invoke to Win32 (or other) APIs which expect a null-terminated string.
When you do Substring(0, 5) the "oh, but I promised there'd be a null-character after the last character" rule says you need to make a copy. Even if you got the substring at the e...
How and when to use ‘async’ and ‘await’
...nd thread, but it also doesn't block. This is possible due to asynchronous API's which use callbacks instead of juggling with threads. You initiate an (I/O, socket, ..) operation and return to doing your things. When the operation is done, the OS will invoke the callback. This is what Node.js or the...
Understanding Canvas and Surface concepts
...
That is how drawing happens Canvas is the 2d drawing API. If you are going to draw o to a surface, you need to make a Canvas that points to its buffer to use the Canvas 2d drawing API to draw in to it.
– hackbod
Oct 13 '11 at 3:15
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How to create REST URLs without verbs?
...ve 500 for uncaught exceptions
401 Unauthorized when someone accesses your API either without supplying a necessary Authorization header or when the credentials within the Authorization are invalid; don't use this response code if you aren't expecting credentials via an Authorization header.
403 For...