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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
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Adding :default => true to boolean in existing Rails column
...ls 5:
change_column_default :products, :approved, from: true, to: false
http://edgeguides.rubyonrails.org/active_record_migrations.html#changing-columns
Rails 4.2:
change_column_default :products, :approved, false
http://guides.rubyonrails.org/v4.2/active_record_migrations.html#changing-colu...
Abort makefile if variable not set
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Excel to CSV with UTF8 encoding [closed]
I have an Excel file that has some Spanish characters (tildes, etc.) that I need to convert to a CSV file to use as an import file. However, when I do Save As CSV it mangles the "special" Spanish characters that aren't ASCII characters. It also seems to do this with the left and right quotes and l...
Regular Expression for alphanumeric and underscores
...nally appreciate the readability of the full POSIX character class names ( http://www.zytrax.com/tech/web/regex.htm#special ), so I'd say:
^[[:alnum:]_]+$
However, while the documentation at the above links states that \w will "Match any character in the range 0 - 9, A - Z and a - z (equivalent ...
Good examples of Not a Functor/Functor/Applicative/Monad?
While explaining to someone what a type class X is I struggle to find good examples of data structures which are exactly X.
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What is the maximum length of data I can put in a BLOB column in MySQL?
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May or may not be accurate, but according to this site: http://www.htmlite.com/mysql003.php.
BLOB A string with a maximum length of 65535 characters.
The MySQL manual says:
The maximum size of a BLOB or TEXT
object is determined by its type, but
the largest value y...
Parse JSON String into a Particular Object Prototype in JavaScript
I know how to parse a JSON String and turn it into a JavaScript Object.
You can use JSON.parse() in modern browsers (and IE9+).
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How do I parse command line arguments in Java?
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Check these out:
http://commons.apache.org/cli/
http://www.martiansoftware.com/jsap/
http://picocli.info/
Or roll your own:
http://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html
For instance, this is how you use commons-cli ...
Jenkins Git Plugin: How to build specific tag?
I am having issues getting Jenkins to build a specified tag. The tag is part of a parametrized build, but I do not know how to pass this through to the git plugin to just build that tag. This has been taking 3 hours of my day and I have conceded defeat to the masters at stack overflow.
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