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How do RVM and rbenv actually work?
.../shims:$PATH"
Then any time you run ruby from the command line, or run a script whose shebang reads #!/usr/bin/env ruby, your operating system will find ~/.rbenv/shims/ruby first and run it instead of any other ruby executable you may have installed.
Each shim is a tiny Bash script that in turn r...
When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
...g mode (support may vary by compiler version):
Value Name Description
------ -------- -------------------------
0xCD Clean Memory Allocated memory via malloc or new but never
written by the application.
0xDD Dead Memory Memory that ...
Check if an element's content is overflowing?
...le 1: https://codepen.io/Kagerjay/pen/rraKLB ( Real simple example, no javascript, just to clip overflowed items)
Example 2: https://codepen.io/Kagerjay/pen/LBErJL (Single event handler show more / showless on overflowed items)
Example 3: https://codepen.io/Kagerjay/pen/MBYBoJ (Multi event handler...
Can I combine :nth-child() or :nth-of-type() with an arbitrary selector?
...ome)
Because there is currently no pure CSS solution, you'll have to use a script to filter elements and apply styles or extra class names accordingly. For example, the following is a common workaround using jQuery (assuming there is only one row group populated with tr elements within the table):
$...
Difference between this and self in JavaScript
Everyone is aware of this in javascript, but there are also instances of self encountered in the wild, such as here
5 ...
When to use symbols instead of strings in Ruby?
If there are at least two instances of the same string in my script, should I instead use a symbol?
4 Answers
...
Business logic in MVC [closed]
... is independent of whether you use a domain driven design or a transaction script based approach.
Let me visualize that for you:
Presentation layer: Model - View - Controller
Business layer: Domain logic - Application logic
Data layer: Data repositories - Data access layer
The model tha...
How can I quantify difference between two images?
...on:
if __name__ == "__main__":
main()
Now you can put this all in a script and run against two images. If we compare image to itself, there is no difference:
$ python compare.py one.jpg one.jpg
Manhattan norm: 0.0 / per pixel: 0.0
Zero norm: 0 / per pixel: 0.0
If we blur the image and comp...
How do I split a string on a delimiter in Bash?
...
Taken from Bash shell script split array:
IN="bla@some.com;john@home.com"
arrIN=(${IN//;/ })
Explanation:
This construction replaces all occurrences of ';' (the initial // means global replace) in the string IN with ' ' (a single space), then ...
If REST applications are supposed to be stateless, how do you manage sessions?
... would need to retrieve the data: authentication and the URI.
Transaction scripts
As noted above, the client-side application itself calls the REST services along with the authentication that it manages on the client side as well.
What this means for REST services [if done correctly] is to take a...