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Building a complete online payment gateway like Paypal [closed]
... of major banks, they all end up using one of five or so card acquirers.
Happily, all UK card acquirers use a standard protocol for communication of authorisation requests, and end of day settlement. You will find minor quirks where some acquiring banks support some features and have slightly diff...
Rails Object to hash
...u could override that method in order to customize the way your attributes appear, by doing something like this :
class Post < ActiveRecord::Base
def as_json(*args)
{
:name => "My name is '#{self.name}'",
:post_number => "Post ##{self.post_number}",
}
end
end
Then...
How do you dismiss the keyboard when editing a UITextField
...egates to equal this viewController ... this allows for the keyboard to disappear after pressing done
daTextField.delegate = self;
}
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Callback functions in Java
...rt java.util.function.Function;
public MyClass {
public static String applyFunction(String name, Function<String,String> function){
return function.apply(name);
}
}
then you can call it like so
MyClass.applyFunction("42", str -> "the answer is: " + str);
// returns "the an...
Android emulator shows nothing except black screen and adb devices shows “device offline”
...at runs emulators through team viewer. In Android Studio 2.0, this option appears in the downward arrow next to the edit button -> "Wipe Data"
– behelit
Apr 12 '16 at 7:13
...
Writing a list to a file with Python
...e just trying to serialize a list to disk for later use by the same python app, you should be pickleing the list.
import pickle
with open('outfile', 'wb') as fp:
pickle.dump(itemlist, fp)
To read it back:
with open ('outfile', 'rb') as fp:
itemlist = pickle.load(fp)
...
Strange function in ActivityManager: isUserAMonkey. What does this mean, what is its use?
I found the following function in package android.app.ActivityManager .
2 Answers
2
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Usages of Null / Nothing / Unit in Scala
...mple is this:
implicit def zeroNull[B >: Null] =
new Zero[B] { def apply = null }
Nothing is used in the definition of None
object None extends Option[Nothing]
This allows you to assign a None to any type of Option because Nothing 'extends' everything.
val x:Option[String] = None
...
How to lay out Views in RelativeLayout programmatically?
... someOtherView.getId())
lp.addRule(RelativeLayout.ALIGN_PARENT_LEFT)
Just apply the layout params: The most 'healthy' way to do that is:
parentLayout.addView(myView, lp)
Watch out: Don't change layout from the layout callbacks. It is tempting to do so because this is when views get their actual...
How to automatically crop and center an image
...can use background-size: cover; to get the image to shrink or fill the div appropriately while maintaining the original aspect ratio.
– Nick
Apr 30 '13 at 16:48
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