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SQL - many-to-many table primary key
...ving a primary key on (col1,col2) is guaranteed unique (assuming your col1 and col2 values in the referenced tables are unique) and a separate index on (col2,col1) will catch those cases where the opposite order would execute faster. The surrogate is a waste of space.
You won't need indexes on the ...
Finding all possible permutations of a given string in python
... not specified or is None, then r defaults to the length of the
iterable and all possible full-length permutations are generated.
Permutations are emitted in lexicographic sort order. So, if the input
iterable is sorted, the permutation tuples will be produced in sorted
order.
You'll ha...
$(window).width() not the same as media query
... }
}
window.matchMedia is fully consistent with the CSS media queries and the browser support is quite good: http://caniuse.com/#feat=matchmedia
UPDATE:
If you have to support more browsers you can use Modernizr's mq method, it supports all browsers that understand media queries in CSS.
if (...
Drawing text to with @font-face does not work at the first time
...ace, the text doesn't show correctly. It doesn't show at all (in Chrome 13 and Firefox 5), or the typeface is wrong (Opera 11). This type of unexpected behavior occurs only at the first drawing with the typeface. After then everything works fine.
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Creating threads - Task.Factory.StartNew vs new Thread()
I am just learning about the new Threading and Parallel libraries in .Net 4
4 Answers
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Razor HtmlHelper Extensions (or other namespaces for views) Not Found
...nsure you have the right config values.
Note that you might need to close and reopen the file for the changes to be picked up by the editor.
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Save modifications in place with awk
I am learning awk and I would like to know if there is an option to write changes to file, similar to sed where I would use -i option to save modifications to a file.
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How can I get device ID for Admob
I'm using Eclipse to develop applications for android, and I want to integrate Admob to make money.
The tutorial says I should watch the LogCat to find ID, but where is it?
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How to remove focus without setting focus to another control?
I like my UIs to be intuitive; each screen should naturally and unobtrusively guide the user on to the next step in the app. Barring that, I strive to make things as confusing and confounding as possible.
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Open firewall port on CentOS 7
I am using CentOS 7 and I have to ensure that ports 2888 and 3888 are open.
12 Answers
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