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How to write a bash script that takes optional input arguments?
...l - 3.5.3 Shell Parameter Expansion [emphasis mine]:
If parameter is unset or null, the expansion of word is substituted. Otherwise, the value of parameter is substituted.
If you only want to substitute a default value if the parameter is unset (but not if it's null, e.g. not if it's an empty ...
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
I'm working on a UI for an app, and I'm attempting to use grayscale icons, and allow the user to change the theme to a color of their choosing. To do this, I'm trying to just apply a ColorFilter of some sort to overlay a color on top of the drawable. I've tried using PorterDuff.Mode.MULTIPLY, and it...
How to generate a number of most distinctive colors in R?
I am plotting a categorical dataset and want to use distinctive colors to represent different categories. Given a number n , how can I get n number of MOST distinctive colors in R? Thanks.
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Copy folder recursively, excluding some folders
...m trying to write a simple bash script that will copy the entire contents of a folder including hidden files and folders into another folder, but I want to exclude certain specific folders. How could I achieve this?
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Multiple glibc libraries on a single host
... loader search for libraries in /path/to/newglibc (so you wouldn't have to set LD_LIBRARY_PATH before running it), and the -dynamic-linker option will "bake" path to correct ld-linux.so.2 into the application.
If you can't relink the myapp application (e.g. because it is a third-party binary), not ...
How can I escape a double quote inside double quotes?
...is \x22text\x22'
$ echo "$a"
This is "text"
If the variable is already set by another program, you can still apply double/single quotes with sed or similar tools.
Example:
$ b="Just another text here"
$ echo "$b"
Just another text here
$ sed 's/text/"'\0'"/' <<<"$b" #\0 is a speci...
How to send a simple string between two programs using pipes?
...ng on the net, but there are hardly any resources. A small example would suffice.
7 Answers
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How to print a linebreak in a python function?
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Add file extension to files with bash
What is the good way to add file extension ".jpg" to extension-less files with bash?
10 Answers
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Print current call stack from a method in Python code
...import pdb
Then in the code where you want to see what is happening
pdb.set_trace()
and you get dropped into a prompt
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