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Best way to select random rows PostgreSQL
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Starting with PostgreSQL 9.5, there's a new syntax dedicated to getting random elements from a table :
SELECT * FROM mytable TABLESAMPLE SYSTEM (5);
This example will give you 5% of elements from mytable.
See more explanation on the documentation: http://www.postg...
Tying in to Django Admin's Model History
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The new home of django-simple-history seems to be: github.com/treyhunner/django-simple-history More info on RTD django-simple-history.readthedocs.org/en/latest
– Brutus
Jul 28 '14 at 8:05
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Can you resolve an angularjs promise before you return it?
...ferencing the injected Service.whatever
Seems to work ok. But I am kinda new to angular. *error handling mostly left out for clarity
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Spring MVC @PathVariable getting truncated
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For Spring 3.1 users - if you're using the new RequestMappingHandlerMapping instead, the property to set is useSuffixPatternMatch (also to false). @Ted: the linked issue mentions that in 3.2 they hope to add a bit more control so it doesn't have to be all-or-nothing.
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Best practice to run Linux service as a different user
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On Debian we use the start-stop-daemon utility, which handles pid-files, changing the user, putting the daemon into background and much more.
I'm not familiar with RedHat, but the daemon utility that you are already using (which is defined in /etc/init.d/functions, btw.) is mentioned ev...
How do I convert a String object into a Hash object?
...all of the objects in the hash.
If I start with the hash {:a => Object.new}, then its string representation is "{:a=>#<Object:0x7f66b65cf4d0>}", and I can't use eval to turn it back into a hash because #<Object:0x7f66b65cf4d0> isn't valid Ruby syntax.
However, if all that's in th...
Can I have an onclick effect in CSS?
...btnLeft" /></label>
With that being said, there is some bad news. Because a label can only be associated with one form control at a time, that means you can't just drop a button inside the <label></label> tags and call it a day. However, we can use some CSS to make the lab...
regex.test V.S. string.match to know if a string matches a regular expression
... bit my team recently): If you use the 'g' flag on your Regex and create a new instance (i.e. via new RegExp(<regex_str>, 'g')) and you reuse that instance, running "test" is stateful, i.e. will return different results when run multiple times. See developer.mozilla.org/en-US/docs/Web/JavaScri...
difference between css height : 100% vs height : auto
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How do I dump an object's fields to the console?
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server = TCPServer.new 0 ; puts server.inspect #<TCPServer:fd 9> => nil . it won't work for most complex objects.
– ribamar
Jul 25 '16 at 14:13
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