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Function Pointers in Java
...flection to do it.
Pass as parameter the object and the method name (as a string) and then invoke the method. For example:
Object methodCaller(Object theObject, String methodName) {
return theObject.getClass().getMethod(methodName).invoke(theObject);
// Catch the exceptions
}
And then use ...
Proper use cases for Android UserManager.isUserAGoat()?
...changed in API 21.
/**
* Used to determine whether the user making this call is subject to
* teleportations.
* @return whether the user making this call is a goat
*/
public boolean isUserAGoat() {
return false;
}
It looks like the method has no real use for us as developers. Someone has ...
How to create “No Activate” form in Firemonkey
...ild of NSPanel. I have written a helper class which works for both Windows and Mac platforms (Works on XE4):
unit NoActivateForm;
interface
uses Fmx.Forms, Fmx.Types
{$IFDEF POSIX}
, Macapi.AppKit
{$ENDIF}
;
type TNoActivateForm = class
private
form: TForm;
{$IFDEF POSIX}
panel: ...
What is uintptr_t data type
...signed integer type that is capable of storing a data pointer. Which typically means that it's the same size as a pointer.
It is optionally defined in C++11 and later standards.
A common reason to want an integer type that can hold an architecture's pointer type is to perform integer-specific ope...
What's a concise way to check that environment variables are set in a Unix shell script?
...st variant (using just ?) requires STATE to be set, but STATE="" (an empty string) is OK — not exactly what you want, but the alternative and older notation.
The second variant (using :?) requires DEST to be set and non-empty.
If you supply no message, the shell provides a default message.
The ${v...
Java FileOutputStream Create File if not exists
Is there a way to use FileOutputStream in a way that if a file (String filename) does not exist, then it will create it?
9 ...
Android add placeholder text to EditText
...What you're looking for is setHint(int). Simply pass in a resource id of a string from your xml and you're good to go.
EDIT
And in XML, it's simply android:hint="someText"
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How can I read numeric strings in Excel cells as string (not numbers)?
What can I do to read the value as string?
20 Answers
20
...
converting Java bitmap to byte array
...below functions to encode bitmap into byte[] and vice versa
public static String encodeTobase64(Bitmap image) {
Bitmap immagex = image;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
immagex.compress(Bitmap.CompressFormat.PNG, 90, baos);
byte[] b = baos.toByteArray();
...
Rerender view on browser resize with React
...height}</span>;
}
The advantage here is the logic is encapsulated, and you can use this Hook anywhere you want to use the window size.
Using React classes:
You can listen in componentDidMount, something like this component which just displays the window dimensions (like <span>Window ...