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Lisp in the real world
...ike a very hollow mantra to me. Sure, it may be around in those areas, but then mostly as legacy code. In my experience from real life, Python combined with swigged C/C++ has much replaced Lisp as the rapid prototyping language(s) of choice for pragmatic hackers.
– Johan Kotlin...
Runnable with a parameter?
...ly posted this and to be honest, Java has made a couple improvements since then. I'll leave my original answer below, but there's no need for people to do what is in it. 9 years ago, during code review I would have questioned why they did it and maybe approved it, maybe not. With modern lambdas avai...
Jackson serialization: ignore empty values (or null)
...e(JsonInclude.Include.NON_NULL)
on top of POJO
If you have nested POJO then
@JsonInclude(JsonInclude.Include.NON_NULL)
need to add on every values.
NOTE:
JAXRS (Jersey) automatically handle this scenario 2.6 and above.
...
How to determine if a process runs inside lxc/Docker?
...ner.
You can run this script to verify
#!/bin/bash
if [ -f /.dockerenv ]; then
echo "I'm inside matrix ;(";
else
echo "I'm living in real world!";
fi
MORE:
Ubuntu actually has a bash script: /bin/running-in-container and it actually can return the type of container it has been invoked i...
Removing packages installed with go get
... At first I looked for $GOPATH/pkg/architecture/ which didn't exist. Then I realized that what you were referring to was $GOPATH/pkg/{{architecture}}, example $GOPATH/pkg/windows_amd64.
– Nucleon
Dec 9 '12 at 23:09
...
Unwanted padding around an ImageView
... It drove me nuts because the image looked fine on all the devices I own, then when I'd try it on a friend's device, it looked like crap. THANK YOU.
– DiscDev
Dec 14 '12 at 15:09
...
Java - get pixel array from image
...B() method combines the alpha, red, green and blue values into one int and then returns the result, which in most cases you'll do the reverse to get these values back.
The second method will return the red, green and blue values directly for each pixel, and if there is an alpha channel it will add ...
Selectively revert or checkout changes to a file in Git?
...path>
to stage the chunks that you want to keep in a particular file, then
git checkout -- <path>
to discard the working tree changes that you didn't want to keep, by checking out the staged version of the file.
Finally, you can use
git reset -- <path>
to revert the staged ve...
How to erase the file contents of text file in Python?
...
#include<fstream> and then std::ofstream("file.txt"); about as short as in Python. :)
– wilhelmtell
May 4 '10 at 21:44
8
...
What causes “Unable to access jarfile” error?
... The quotations did the trick for me since I also had spaces inbetween. I then tried it without spaces in the path and without quotation marks and then it worked also
– Timothy
Feb 19 '17 at 17:25
...