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How to make Java honor the DNS Caching Timeout?
...d domain name. Through some DNS magic, the domain name is resolved into an IP that's closest to the server with least load. For the load-balancing to work, the application server needs to honor the TTL from DNS response and to resolve the domain name again when cache times out. However, I couldn't f...
How unique is UUID?
...ead.
Source: The Random UUID probability of duplicates section of the Wikipedia article on Universally unique identifiers (link leads to a revision from December 2016 before editing reworked the section).
Also see the current section on the same subject on the same Universally unique identifier a...
HashMap get/put complexity
...could have a hash which takes a long time to compute, and if there are multiple items in the hash map which return the same hash code, get will have to iterate over them calling equals on each of them to find a match.
In the worst case, a HashMap has an O(n) lookup due to walking through all entrie...
S3 Static Website Hosting Route All Paths to Index.html
I am using S3 to host a javascript app that will use HTML5 pushStates. The problem is if the user bookmarks any of the URLs, it will not resolve to anything. What I need is the ability to take all url requests and serve up the root index.html in my S3 bucket, rather than just doing a full redirect. ...
The definitive guide to form-based website authentication [closed]
...now how to build a login+password HTML form which POSTs the values to a script on the server side for authentication. The sections below will deal with patterns for sound practical auth, and how to avoid the most common security pitfalls.
To HTTPS or not to HTTPS?
Unless the connection is already se...
Connection timeout for SQL server
...your DNS (or hosts file), but the pointing to an incorrect or inaccessible IP, you'll get a timeout rather than a machine-not-found-ish error.
The query you're calling is timing out. It can look like the connection to the server is the problem, but, depending on how your app is structured, you coul...
Save PL/pgSQL output from PostgreSQL to a CSV file
...to do the file handling on the client side, i.e. in your application or script. The Postgres server doesn't need to know what file you're copying to, it just spits out the data and the client puts it somewhere.
The underlying syntax for this is the COPY TO STDOUT command, and graphical tools like p...
Copy file remotely with PowerShell
I am writing a PowerShell script that I want to run from Server A.
I want to connect to Server B and copy a file to Server A as a backup.
...
How to run travis-ci locally
...dited Feb 12 '19 at 8:40
Carson Ip
1,6161414 silver badges2525 bronze badges
answered Feb 28 '18 at 0:05
Willi...
What platforms have something other than 8-bit char?
...
Machines with 36-bit architectures have 9-bit bytes. According to Wikipedia, machines with 36-bit architectures include:
Digital Equipment Corporation PDP-6/10
IBM 701/704/709/7090/7094
UNIVAC 1103/1103A/1105/1100/2200,
...