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How does facebook, gmail send the real time notification?
...e pointless requests, because nothing has happened.
The way Facebook does it is using the comet approach, rather than polling on an interval, as soon as one poll completes, it issues another one. However, each request to the script on the server has an extremely long timeout, and the server only r...
Are fluid websites worth making anymore? [closed]
I'm making a website now and I am trying to decide if I should make it fluid or not. Fixed width websites are much easier to make and also much easier to make them appear consistent.
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Why is Python running my module when I import it, and how do I stop it?
I have a Python program I'm building that can be run in either of 2 ways: the first is to call "python main.py" which prompts the user for input in a friendly manner and then runs the user input through the program. The other way is to call "python batch.py -file- " which will pass over all the fr...
What is the pythonic way to avoid default parameters that are empty lists?
Sometimes it seems natural to have a default parameter which is an empty list. Yet Python gives unexpected behavior in these situations .
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Uses for Optional
Having been using Java 8 now for 6+ months or so, I'm pretty happy with the new API changes. One area I'm still not confident in is when to use Optional . I seem to swing between wanting to use it everywhere something may be null , and nowhere at all.
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How to request Google to re-crawl my website? [closed]
Does someone know a way to request Google to re-crawl a website? If possible, this shouldn't last months. My site is showing an old title in Google's search results. How can I show it with the correct title and description?
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Should Jquery code go in header or footer?
...ut Jquery code (or separate Jquery file)? Will pages load faster if I put it in the footer?
9 Answers
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How does a language expand itself? [closed]
...am learning C++ and I've just started learning about some of Qt 's capabilities to code GUI programs. I asked myself the following question:
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How to upgrade PowerShell version from 2.0 to 3.0
...is Windows 7, and the PowerShell version that is installed here is 2.0. Is it possible for me to upgrade it to version 3.0 or 4.0?
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How to create a windows service from java app
I've just inherited a java application that needs to be installed as a service on XP and vista. It's been about 8 years since I've used windows in any form and I've never had to create a service, let alone from something like a java app (I've got a jar for the app and a single dependency jar - log4j...