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Android: How can I get the current foreground activity (from a service)?
...rvice.
You can request a maximum number of tasks running on the phone, and by default, the currently active task is returned first.
Once you have that you can get a ComponentName object by requesting the topActivity from your list.
Here's an example.
ActivityManager am = (ActivityManager) thi...
How to update a value, given a key in a hashmap?
...ou can update with your requirement. Here I am updating to increment value by 1.
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Remove whitespaces inside a string in javascript
..."hello world".replace(/\s/g, "");
for all white space use the suggestion by Rocket in the comments below!
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How to detect if a function is called as constructor?
... x as a function, unless you assign a property to every new object created by x as it is constructed:
function x(y) {
var isConstructor = false;
if (this instanceof x // <- You could use arguments.callee instead of x here,
// except in in EcmaScript 5 strict mod...
ruby inheritance vs mixins
In Ruby, since you can include multiple mixins but only extend one class, it seems like mixins would be preferred over inheritance.
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Best implementation for hashCode method for a collection
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For every field f tested in the equals() method, calculate a hash code c by:
If the field f is a boolean:
calculate (f ? 0 : 1);
If the field f is a byte, char, short or int: calculate (int)f;
If the field f is a long: calculate (int)(f ^ (f >>> 32));
If the field f is a float: calcula...
How to get the function name from within that function?
...slightly better choice than hardcoding the string.
– byxor
Dec 4 '19 at 11:49
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catch all unhandled exceptions in ASP.NET Web Api
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Certain 500 errors still don't get caught by this, eg. HttpException - the remote host closed the connection. Is there still a place for global.asax Application_Error to handle errors outside web api processing?
– Avner
Jun 3 '...
Delete specific line number(s) from a text file using sed?
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You can delete a particular single line with its line number by
sed -i '33d' file
This will delete the line on 33 line number and save the updated file.
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What is the difference between a directory and a folder?
... the term "Folder" as part of its "desktop metaphor", this was popularized by the 1980's Mac, and became universal in later GUIs including Windows. But at the command line, it's still a "directory".
– Orion Lawlor
Aug 28 at 7:28
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