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Best way to repeat a character in C#
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Make it better by doing it without Linq and with StruingBuilder!
– Bitterblue
Apr 15 '14 at 15:29
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tmux: How to join two tmux windows into one, as panes?
...her, not to move window. join-pane -s 2 -t 1 does not put two windows side by side, but two panes instead. It's just that the windows happen to have only one pane each. If you have two windows both of which have multiple panes, to put two of panes, say they are pane 0.0 and 1.0, side by side, you ca...
What is the difference between SIGSTOP and SIGTSTP?
...GTSTP (for signal - terminal stop) may also be sent through the tty driver by a user typing on a keyboard, usually Control-Z.
SIGSTOP cannot be ignored. SIGTSTP might be.
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Python division
...m __future__ import division you can get the old C-style division behavior by using two slashes (e.g. 1 // 2 will result in 0). See Pep 238 Changing the Division Operator
– User
Nov 28 '13 at 5:40
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How to remove a column from an existing table?
...t generally speaking this is not so trivial.
If this column is referenced by other tables then you need to figure out what to do with other tables/columns. One option is to remove foreign keys and keep referenced data in other tables.
Another option is to find all referencing columns and remove th...
Using XPATH to search text containing
...s based on
how the text looks in the browser when
rendered. We do this by replacing all
non-visible whitespace (including the
non-breaking space " ") with a
single space. All visible newlines
(<br>, <p>, and <pre> formatted
new lines) should be preserved.
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How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
...TER TABLE test1 ADD COLUMN id INTEGER;
CREATE SEQUENCE test_id_seq OWNED BY test1.id;
ALTER TABLE test ALTER COLUMN id SET DEFAULT nextval('test_id_seq');
UPDATE test1 SET id = nextval('test_id_seq');
Again, in recent versions of Postgres this is roughly equivalent to the single command abov...
How do I compute derivative using Numpy?
...rences
Automatic Derivatives
Symbolic Differentiation
Compute derivatives by hand.
Finite differences require no external tools but are prone to numerical error and, if you're in a multivariate situation, can take a while.
Symbolic differentiation is ideal if your problem is simple enough. Symb...
How to set standard encoding in Visual Studio
....csproj, .sln, .config, .as*x, etc, all save as UTF-8 (with signature, the byte order marks), by default.
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Finding the number of days between two dates
... but this does NOT account for Daylight Saving Time changes! It can be off by an entire day over those boundaries every year. You need to use the DateTime classes.
– Levi
Dec 4 '12 at 3:34
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