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When to use an interface instead of an abstract class and vice versa?
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This was ery helpful: Interfaces do not express something like "a Doberman is a type of dog and every dog can walk" but more like "this thing can walk". Thank you
– aexl
Nov 9 '14 at 11:07
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Get filename and path from URI from mediastore
I have an onActivityResult returning from an mediastore image selection which I can get a URI for an image using the following:
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SqlException from Entity Framework - New transaction is not allowed because there are other threads
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Yeah, this caused me a headache too. I almost fell off my chair when I found the problem! I understand the technical reasons behind the problem, but this isn't intuitive and it isn't helping the developer to fall into the "pit of success" blog...
how to use sed, awk, or gawk to print only what is matched?
... 's/^.*abc\([0-9]*\)xyz.*$/\1/p' example.txt
For matching at least one numeric character without +, I would use:
sed -n 's/^.*abc\([0-9][0-9]*\)xyz.*$/\1/p' example.txt
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Regular expression for a hexadecimal number?
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Copying PostgreSQL database to another server
I'm looking to copy a production PostgreSQL database to a development server. What's the quickest, easiest way to go about doing this?
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How to differentiate single click event and double click event?
...button in li with id "my_id" . I attached two jQuery events with this element
18 Answers
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Jump into interface implementation in Eclipse IDE
You know how in Eclipse, pressing F3 over a method will take you to its declaration? Well I have a method that is part of an interface; clicking F3 over this naturally takes me to the declaring interface.
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Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
...other example of what you can do in field_error_proc, checke out this awesome gist: gist.github.com/1464315
– Ryan Sandridge
Jun 26 '12 at 19:09
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How to assign text size in sp value using java code
...y. It's easily done as follows: SCREEN_DENSITY = getResources().getDisplayMetrics().density; yourView.setTextSize(TypedValue.COMPLEX_UNIT_SP, (desiredTextHeightInSP / SCREEN_DENSITY);
– PeteH
Sep 13 '14 at 23:50
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