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What is the exact meaning of IFS=$'\n'?
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Normally bash doesn't interpret escape sequences in string literals. So if you write \n or "\n" or '\n', that's not a linebreak - it's the letter n (in the first case) or a backslash followed by the letter n (in the other two cases).
$'somestring' is a syntax for string liter...
Vibrate and Sound defaults on notification
...sing default vibrate and sound from system.
private void sendNotification(String message, String tick, String title, boolean sound, boolean vibrate, int iconID) {
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pending...
Command to change the default home directory of a user
...ou can also use bind-mount:
mkdir /home/username
mount --bind --verbose /extra-home/username /home/username
This is useful for allowing access "through" the /home directory to subdirs via daemons that are otherwise configured to avoid pathing through symlinks (apache, ftpd, etc.).
You have to r...
SqlAlchemy - Filtering by Relationship Attribute
...u: I recently made package that gives you filtering/sorting with "magical" strings as in Django, so you can now write something like
Patient.where(mother___phenoscore=10)
It's a lot shorter, especially for complex filters, say,
Comment.where(post___public=True, post___user___name__like='Bi%')
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Mixin vs inheritance
...riety of parent classes. Mixins may call a method (for example sayHello(): String) even though they do not define such a method.
mixin M {
name: String
defmethod greetings() { print sayHello() + " " + name}
}
As you see, you can call sayHello() even though it is not defined anywhere. If ...
How to select option in drop down protractorjs e2e tests
... Note that you can get partial matches, so 'Small' will match 'Extra Small'.
– TrueWill
Aug 18 '15 at 16:12
3
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What is the use of the pipe symbol in YAML?
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Also look at in-yaml-how-do-i-break-a-string-over-multiple-lines
– Oliver
Apr 12 '18 at 13:18
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Computed / calculated / virtual / derived columns in PostgreSQL
...l, but makes makes life a bit easier).
Suppose my computation is md5(some_string_field), then I create the index as:
CREATE INDEX some_string_field_md5_index ON some_table(MD5(some_string_field));
Now, any queries that act on MD5(some_string_field) will use the index rather than computing it fr...
Plotting time in Python with Matplotlib
...ar is set to 1990": Could you please post the code you use to convert from string to datetime? Something might be wrong with the conversion. Re. the formatting of chart labels, see the date_demo1 link provided by J. K. Seppänen. The matplot lib documentation is excellent, BTW. matplotlib.sourceforg...
Regular Expression to match only alphabetic characters
I was wondering If I could get a regular expression which will match a string that only has alphabetic characters, and that alone.
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