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Webrick as production server vs. Thin or Unicorn?
...website usually needs, like multiple workers (in particular, pre-forking, life cycle management, asynchronous handling, etc), redirects, rewriting, etc
When I mention redirects/rewrites, I'm referring to the fact that using Webrick, you have to handle rewrites at a different layer (Rack, Sinatra, ...
JavaScript: Get image dimensions
... @AjayGaur because onload is a listener that will be called asynchronously if the image is loaded correctly. If you set the listener after setting the url, the image could load just before the code reachs setting the onload itself, resulting in the listener never being called. Using analogies, if y...
How to pass the -D System properties while testing on Eclipse?
...perty("key") ... How do I pass this in Eclipse so that I do not have to modify the code and it works on Eclipse for debugging?
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cartesian product in pandas
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If you have a key that is repeated for each row, then you can produce a cartesian product using merge (like you would in SQL).
from pandas import DataFrame, merge
df1 = DataFrame({'key':[1,1], 'col1':[1,2],'col2':[3,4]})
df2...
What would be the Unicode character for big bullet in the middle of the character?
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Beware of semantics under various fonts (if that is beyond your control on receivers device): A circle will (should) always be a circle in any font. A bullet might be a square or even a brush stroke depending on font family... there's certainly even more leeway for ...
What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
6 Answers
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Is there a .NET equivalent to Apache Hadoop? [closed]
...roach is often the best and it looks like other folks are doing the same.
If you look at projects like protocol-buffers or facebook's thrift you see that sometimes it's just best to use an app written in another language and build the glue in the language of your preference.
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How do I fix "The expression of type List needs unchecked conversion…'?
...ast up front, you're "complying with the warranty terms" of Java generics: if a ClassCastException is raised, it will be associated with a cast in the source code, not an invisible cast inserted by the compiler.
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Regular expression: find spaces (tabs/space) but not newlines
...ition to whatever other whitespace you're targeting, such as [ \t\u3000].
If you're using Perl or PCRE, you have the option of using the \h shorthand for horizontal whitespace, which appears to include the single-byte space, double-byte space, and tab, among others. See the Match whitespace but no...
How can I extract a predetermined range of lines from a text file on Unix?
...y only used in conjunction with the -n command-line option.
n -
If auto-print is not disabled, print the pattern space, then, regardless, replace the pattern space with the next line of input. If
there is no more input then sed exits without processing any more
commands.
q -
Ex...