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Synchronization vs Lock
...in order to access the critical resource. It gives method such as park() and unpark() .
11 Answers
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In Flux architecture, how do you manage Store lifecycle?
...about Flux but the example Todo app is too simplistic for me to understand some key points.
3 Answers
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return, return None, and no return at all?
...
On the actual behavior, there is no difference. They all return None and that's it. However, there is a time and place for all of these.
The following instructions are basically how the different methods should be used (or at least how I was taught they should be used), but they are not absol...
Can we instantiate an abstract class?
... are creating an instance of an anonymous subclass of your abstract class. And then you are invoking the method on your abstract class reference pointing to subclass object.
This behaviour is clearly listed in JLS - Section # 15.9.1: -
If the class instance creation expression ends in a class b...
How to get scrollbar position with Javascript?
...iew is. My guess is that I have to detect where the thumb on the track is, and then the height of the thumb as a percentage of the total height of the track. Am I over-complicating it, or does JavaScript offer an easier solution than that? Any ideas code-wise?
...
Which websocket library to use with Node.js? [closed]
...answer. Feel free to edit me with your improvements.
ws
WebSocket server and client for node.js. One of the fastest libraries if not the fastest one.
websocket-node
WebSocket server and client for node.js
websocket-driver-node WebSocket server and client protocol parser node.js - used in faye-webs...
What is a NullReferenceException, and how do I fix it?
I have some code and when it executes, it throws a NullReferenceException , saying:
28 Answers
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Performance difference between IIf() and If
... "Alternative")
The first is basically C#'s ternary conditional operator and the second is its coalesce operator (return result unless it’s Nothing, in which case return "Alternative"). If has thus replaced IIf and the latter is obsolete.
Like in C#, VB's conditional If operator short-circuits,...
How to get browser width using JavaScript code?
...elevant portion is found on line 37 of dimensions.js. Here it is extracted and modified to work standalone:
function getWidth() {
return Math.max(
document.body.scrollWidth,
document.documentElement.scrollWidth,
document.body.offsetWidth,
document.documentElement.offsetWi...
Read and overwrite a file in Python
...
If you don't want to close and reopen the file, to avoid race conditions, you could truncate it:
f = open(filename, 'r+')
text = f.read()
text = re.sub('foobar', 'bar', text)
f.seek(0)
f.write(text)
f.truncate()
f.close()
The functionality will likely...