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Func vs. Action vs. Predicate [duplicate]
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The difference between Func and Action is simply whether you want the delegate to return a value (use Func) or not (use Action).
Func is probably most commonly used in LINQ - for example in projections:
list.Select(x => x.SomeProperty)
or filtering:
list.Where(x...
How to check whether a variable is a class or not?
...True
>>> x = X()
>>> isinstance(x, X)
True
>>> y = 25
>>> isinstance(y, X)
False
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How to format a float in javascript?
...(original*100)/100;
The specifics, in case the code isn't self-explanatory.
edit: ...or just use toFixed, as proposed by Tim Büthe. Forgot that one, thanks (and an upvote) for reminder :)
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Is there any way to call a function periodically in JavaScript?
Is there any way to call a function periodically in JavaScript?
9 Answers
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Why does NULL = NULL evaluate to false in SQL server
In SQL server if you have nullParam=NULL in a where clause, it always evaluates to false. This is counterintuitive and has caused me many errors. I do understand the IS NULL and IS NOT NULL keywords are the correct way to do it. But why does SQL server behave this way?
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Creating a “logical exclusive or” operator in Java
...does have a logical XOR operator, it is ^ (as in a ^ b).
Apart from that, you can't define new operators in Java.
Edit: Here's an example:
public static void main(String[] args) {
boolean[] all = { false, true };
for (boolean a : all) {
for (boolean b: all) {
boolean ...
How do I loop through a list by twos? [duplicate]
I want to loop through a Python list and process 2 list items at a time. Something like this in another language:
7 Answers...
PHP Replace last occurrence of a String in a String?
Anyone know of a very fast way to replace the last occurrence of a string with another string in a string?
14 Answers
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How can I create a simple message box in Python?
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You could use an import and single line code like this:
import ctypes # An included library with Python install.
ctypes.windll.user32.MessageBoxW(0, "Your text", "Your title", 1)
Or define a function (Mbox) like so:
i...
Providing white space in a Swing GUI
...rs 'crowded'. How can I provide white space without resorting to explicitly setting the position or size of components?...