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When should I use uuid.uuid1() vs. uuid.uuid4() in python?
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My team just ran into trouble using UUID1 for a database upgrade script where we generated ~120k UUIDs within a couple of minutes. The UUID collision led to violation of a primary key constraint.
We've upgraded 100s of servers but on our Amazon EC2 instances we ran into this issue a few t...
error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' — Miss
...ket file:
socket=/var/lib/mysql/mysql.sock
Sometimes the system startup script that launched the command line executable specifies a flag --socket=path. This flag could override the my.cnf location, and that would result in a socket not being found where the my.cnf file indicates it should be. T...
What is your most productive shortcut with Vim?
...reated as an extension of our editor. I have occasionally used these with scripts that pulled data from a database, or with wget or lynx commands that pulled data off a website, or ssh commands that pulled data from remote systems.
Another useful ex command is :so (short for :source). This reads t...
Using C++ library in C code
...eption like mechanisms (i.e., longjump) in the C code (as found in various scripting languages) are not required to invoke destructors for C++ objects on the stack.
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Orchestration vs. Choreography
...vice composition.
Service Choreography
Service choreography is a global description of the participating services, which is defined by exchange of messages, rules of interaction and agreements between two or more endpoints. Choreography employs a decentralized approach for service composition.
The...
Difference between CR LF, LF and CR line break types?
... @Hashim it might display properly but trying to run a textual shell script with carriage returns will usually result in an error
– Omer
Apr 24 '19 at 14:06
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What's the difference between a web site and a web application? [closed]
...y, the line is fine. Historically, web apps were the ones with code and/or scripts (in Perl/CGI, PHP, ASP, etc.) on the server, and sites were the ones with static pages. Currently, everyone and their uncle's cat are running forums, guestbooks, CMS - that's all server code.
Another distinction is a...
Check if element is visible in DOM
...e display style property. Just make sure that the element isn't fixed. A script to check this, if you have no position: fixed; elements on your page, might look like:
// Where el is the DOM element you'd like to test for visibility
function isHidden(el) {
return (el.offsetParent === null)
}
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Calculating distance between two points, using latitude longitude?
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Here is a page with javascript examples for various spherical calculations. The very first one on the page should give you what you need.
http://www.movable-type.co.uk/scripts/latlong.html
Here is the Javascript code
var R = 6371; // km
var dLat ...
Dialog to pick image from gallery or from camera
...a temporal File. Take a look to the link and you will find a more detailed script
– Mario Velasco
Apr 7 '16 at 7:26
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