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How do I disable form fields using CSS?
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Since the rules are running in JavaScript, why not disable them using javascript (or in my examples case, jQuery)?
$('#fieldId').attr('disabled', 'disabled'); //Disable
$('#fieldId').removeAttr('disabled'); //Enable
UPDATE
The attr function is no longer th...
How to drop columns using Rails migration
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For older versions of Rails
ruby script/generate migration RemoveFieldNameFromTableName field_name:datatype
For Rails 3 and up
rails generate migration RemoveFieldNameFromTableName field_name:datatype
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How can I extract audio from video with ffmpeg?
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FWIW, I have crafted a PHP script, so that I just specify the input video file, and it automatically determines the extension of the output audio file: superuser.com/questions/1301901/…
– Gras Double
Jul 22 '18 ...
Maven-like dependency management for C++? [closed]
...ally include sub-projects look-up for unit tests etc. without changing the script every time.
They have also lots of modules on how to find pre-installed build libraries, required for the project (like Boost, QT etc.)
Update: In the mean time there was some effort to introduce package management...
Is there a way to access the “previous row” value in a SELECT statement?
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Hana SQL script also supports LAG and LEAD.
– mik
Aug 3 '16 at 11:56
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Python memory leaks [closed]
I have a long-running script which, if let to run long enough, will consume all the memory on my system.
9 Answers
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What's the difference between isset() and array_key_exists()? [duplicate]
... could not stress this enough. just spent all day figuring out why a script was taking over 300s to execute. switched to isset(), now executes in less than 3s.
– celwell
Jul 12 '13 at 1:21
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How do I change the working directory in Python?
...path. This definitely works, yet I still use fully-qualified paths in any script I might invoke from Python because there is no guarantee that this will apply outside of the Python program itself.
– SDsolar
Aug 2 '17 at 3:43
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How do I delete rows in a data frame?
...(2, 4, 6), ]
However, if you are trying to write a robust data analysis script, you should generally avoid deleting rows by numeric position. This is because the order of the rows in your data may change in the future. A general principle of a data.frame or database tables is that the order of t...
How to do joins in LINQ on multiple fields in single join
...} syntax. LinqPad is a great tool to see how expressions are behaving (SQL script if LINQ2SQL is used, expression trees etc.)
– Alexei
Sep 8 '16 at 14:57
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