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How do I create a class instance from a string name in ruby?
...o,c| o.const_get c}
=> Foo::Bar
> clazz.new
=> #<Foo::Bar:0x0000010110a4f8>
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Skipping Iterations in Python
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Richie Bendall
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answered Feb 14 '09 at 19:50
AndréAndré
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Django removing object from ManyToMany relationship
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edited Feb 26 at 20:34
Cory Madden
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answered Jun 13 '11...
In PHP, why does not show a parse error?
...commended)
<% ... %> (deprecated and removed ASP-style tag after 5.3.0)
Apparently, you can open a PHP block one way, and close it the other. Didn't know that.
So in your code, you opened the block using <? but PHP recognizes </script> as the closer. What happened was:
<?php ...
Installing older version of R package
...geurl <- "http://cran.r-project.org/src/contrib/Archive/ggplot2/ggplot2_0.9.1.tar.gz"
install.packages(packageurl, repos=NULL, type="source")
If this doesn't work for you and you're on Windows, the reason is probably the lack of an appropriate tool chain for building/compiling packages. Normall...
Right way to reverse pandas.DataFrame?
...n__() which returns 6. Then it tries to call data[j - 1] for j in range(6, 0, -1), and the first call would be data[5]; but in pandas dataframe data[5] means column 5, and there is no column 5 so it will throw an exception. ( see docs )
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Is there a builtin confirmation dialog in Windows Forms?
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RaaghavRaaghav
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Regular Expression for alphanumeric and underscores
...ng that contains only those characters (or an empty string), try
"^[a-zA-Z0-9_]*$"
This works for .NET regular expressions, and probably a lot of other languages as well.
Breaking it down:
^ : start of string
[ : beginning of character group
a-z : any lowercase letter
A-Z : any uppercase letter...
Is there any difference between DECIMAL and NUMERIC in SQL Server?
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They are the same. Numeric is functionally equivalent to decimal.
MSDN: decimal and numeric
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How can I wrap text to some length in Vim?
...tion 1 would be achieved by setting textwidth (for example :set textwidth=30 (from Swaarop's answer)). Then you can reformat your text by highlighting it (in visual mode) and typing gq. (textwidth can be abbreviated as tw, thus :set tw=30.)
Option 2 can be toggled by running :set wrap / :set nowrap...