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Windows batch: echo without new line
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Using set and the /p parameter you can echo without newline:
C:\> echo Hello World
Hello World
C:\> echo|set /p="Hello World"
Hello World
C:\>
Source
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How do I set $PATH such that `ssh user@host command` works?
...ds via ssh user@host command . I have tried adding export PATH=$PATH:$HOME/new_path to ~/.bashrc and ~/.profile on the remote machine, but executing ssh user@host "echo \$PATH" shows that the change has not been picked up (it shows /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/...
jquery find closest previous sibling with class
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thank you Karim. This worked well too, but I assume the .prev() would eat less resources, as .prevAll would get ALL the previous matched elements and then would filter the one I need. Accepting Ed's answer.
– daulex
Feb 22 '10 at 10:54...
PostgreSQL: Difference between text and varchar (character varying)
...limit
varchar(n) – it's problematic to change the limit in live environment (requires exclusive lock while altering table)
varchar – just like text
text – for me a winner – over (n) data types because it lacks their problems, and over varchar – because it has distinct name
The a...
Why are properties without a setter not serialized
...properties in my class generates a Guid in the getter. The property implements no setter and is ignores during serialization. Why is that and do I always have to implement a setter in order for my property to be serialized.
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When should we use Observer and Observable?
An interviewer asked me:
10 Answers
10
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How to RSYNC a single file?
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You do it the same way as you would a directory, but you specify the full path to the filename as the source. In your example:
rsync -avz --progress /var/www/public_html/.htaccess root@<remote-ip>:/var/www/public_html/
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What is a dependency property?
... rather than simply using a backing field to store their value, they use some helper methods on DependencyObject.
The nicest thing about them is that they have all the plumbing for data binding built in. If you bind something to them, they'll notify it when they change.
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Asynchronously wait for Task to complete with timeout
I want to wait for a Task<T> to complete with some special rules:
If it hasn't completed after X milliseconds, I want to display a message to the user.
And if it hasn't completed after Y milliseconds, I want to automatically request cancellation .
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Select rows which are not present in other table
...r:
What is easier to read in EXISTS subqueries?
LEFT JOIN / IS NULL
Sometimes this is fastest. Often shortest. Often results in the same query plan as NOT EXISTS.
SELECT l.ip
FROM login_log l
LEFT JOIN ip_location i USING (ip) -- short for: ON i.ip = l.ip
WHERE i.ip IS NULL;
EXCEPT
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