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Which characters need to be escaped when using Bash?
...in sh but also bash.
1. Put the whole string in single quotes
This works for all chars except single quote itself. To escape the single quote, close the quoting before it, insert the single quote, and re-open the quoting.
'I'\''m a s@fe $tring which ends in newline
'
sed command: sed -e "s/'/'\...
Custom Drawable for ProgressBar/ProgressDialog
...
I used the following for creating a custom progress bar.
File res/drawable/progress_bar_states.xml declares the colors of the different states:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:...
Why use Abstract Base Classes in Python?
...ed to the old ways of duck typing in Python, I fail to understand the need for ABC (abstract base classes). The help is good on how to use them.
...
WITH CHECK ADD CONSTRAINT followed by CHECK CONSTRAINT vs. ADD CONSTRAINT
I'm looking at the AdventureWorks sample database for SQL Server 2008, and I see in their creation scripts that they tend to use the following:
...
Is it possible to use getters/setters in interface definition?
... TypeScript does not allow use get/set methods(accessors) in interfaces.
For example:
4 Answers
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What is __pycache__?
...er, then you can suppress it by starting the interpreter with the -B flag, for example
python -B foo.py
Another option, as noted by tcaswell, is to set the environment variable PYTHONDONTWRITEBYTECODE to any value (according to python's man page, any "non-empty string").
...
How to merge YAML arrays?
...l commands, you may be able to achieve this as follows:
# note: no dash before commands
some_stuff: &some_stuff |-
a
b
c
combined_stuff:
- *some_stuff
- d
- e
- f
This is equivalent to:
some_stuff: "a\nb\nc"
combined_stuff:
- "a\nb\nc"
- d
- e
- f
I have been ...
Difference between abstract class and interface in Python
...ave implemented this" )
Because Python doesn't have (and doesn't need) a formal Interface contract, the Java-style distinction between abstraction and interface doesn't exist. If someone goes through the effort to define a formal interface, it will also be an abstract class. The only differences...
'Java' is not recognized as an internal or external command
...
It works for me after delete the JAVA_HOME and set the whole path to the java bin folder into the first of the Path variable
– Mohammad Heydari
May 11 '18 at 1:35
...
What is the difference between dict.items() and dict.iteritems() in Python2?
...ed as an iterator-generator method named iteritems(). The original remains for backwards compatibility.
One of Python 3’s changes is that items() now return iterators, and a list is never fully built. The iteritems() method is also gone, since items() in Python 3 works like viewitems() in Pytho...