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How to make connection to Postgres via Node.js
...e birth year: %d", row.birthday.getYear()); //dates are returned as javascript dates
console.log("Beatle height: %d' %d\"", Math.floor(row.height / 12), row.height % 12); //integers are returned as javascript ints
});
//fired after last row is emitted
query.on('end', function() {
client.end...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
In multiple courses, books, and jobs, I have seen text fields defined as VARCHAR(255) as kind of the default for "shortish" text. Is there any good reason that a length of 255 is chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a go...
How do I use pagination with Django class based generic ListViews?
..._data()
df = pd.DataFrame(list(self.model.objects.all().values()))
ipc = df.groupby('ip')['ip'].count().sort_values(ascending=False)
urlc = df.groupby('url')['url'].count().sort_values(ascending=False).to_dict()
ipc = tuple(ipc.to_dict().items())
urlc = tuple(urlc.items())
...
Can TCP and UDP sockets use the same port?
...ing connections on the original socket whilst simultaneously servicing multiple clients each of which will be triggering receive events on their own sockets.
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How to configure a HTTP proxy for svn
... @ErikMitchell: Create two versions of the config file and scripts which allow you to switch. Read your OSs docs how to hook into the network discovery mechanism and execute the correct script when your laptop notices where it is.
– Aaron Digulla
O...
What is SaaS, PaaS and IaaS? With examples
...sk image library, block and file-based storage, firewalls, load balancers, IP addresses, virtual local area networks etc.
Examples: Amazon EC2, Windows Azure, Rackspace, Google Compute Engine.
PaaS (Platform as a Service), as the name suggests, provides you computing platforms which typically incl...
How do ports work with IPv6?
Conventional IPv4 dotted quad notation separates the address from the port with a colon, as in this example of a webserver on the loopback interface:
...
What is the difference between OpenID and SAML?
...e of federation. In SAML federations, an account should be a 1:1 relationship with a single person with a current relationship with the IdP "asserting" both the user authentication and authorisation. Entities operating IdPs in a federation must comply with governance around account currency and ver...
Mac OSX Lion DNS lookup order [closed]
... the hosts file, I have found that in some circumstances, Lion queries the IPv6 address for a domain if it senses that a domain is unreachable over the IPv4 network.
I discovered this when I noticed some ads that I had never seen before on Snow Leopard because I had redirected the ad domains to 127...
Practical non-image based CAPTCHA approaches?
...rflow. This is necessary to prevent bots, spammers, and other malicious scripted activity. We only want human beings to post or edit things here!
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