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Ruby on Rails: how do I sort with two columns using ActiveRecord?
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Thank you @Erik - I know this answer is old so here's my warning for those seeing it now: This method has been deprecated starting Rails 3.2. Use Thing.all instead =)
– Abdo
Mar 5 '13 at 9:18
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How can I get the current PowerShell executing file?
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@CollinChaffin: agreed and now (2017) the least currently supported is Windows 7 so there is no reason not to use $PSCommandPath if legacy (WindowsXP) is not required.
– tukan
Dec 11 '17 at 16:30
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A connection was successfully established with the server, but then an error occurred during the pre
...for root cause analysis. Work-arounds have value, but it's more useful to know why this occurs and why the work-around works.
– laindir
Aug 8 '16 at 18:23
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quick random row selection in Postgres
...e optimal solution if you want only one row selected, because you need to know the COUNT of the table to calculate the exact percentage.
To avoid a slow COUNT and use fast TABLESAMPLE for tables from 1 row to billions of rows, you can do:
SELECT * FROM my_table TABLESAMPLE SYSTEM(0.000001) LIMI...
How to check if element is visible after scrolling?
...them are only visible if you scroll down the page. Is there any way I can know if an element is now in the visible part of the page?
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What is the purpose of a question mark after a type (for example: int? myVariable)?
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Thank you for the explanation. I understand now.
– problemofficer
Jul 1 '17 at 3:59
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Convert float to double without losing precision
...point (for example, 0.1). So you either must always round the result to a known precision or use BigDecimal.
See http://en.wikipedia.org/wiki/Floating_point for more information.
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Creating a range of dates in Python
...e import datetime
list(rrule.rrule(rrule.DAILY,count=100,dtstart=datetime.now()))
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Is it possible to hide the cursor in a webpage using CSS or Javascript?
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To my knowledge IE6 supports transparent PNG, as long as it is real transparency and not alpha channel transparency. If in doubt, check yourself with the test suite: libpng.org/pub/png/pngsuite.html.
– Shi
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How to get the name of the calling method?
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Now it seems to be caller_locations[0].label on Ruby 2.2.0 else you always have send_action result
– brcebn
Feb 16 '16 at 15:25
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