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What are the Ruby Gotchas a newbie should be warned about? [closed]
...s.
To denote floating point numbers, one must follow with a zero digit (99.0) or an explicit conversion (99.to_f). It is insufficient to append a dot (99.), because numbers are susceptible to method syntax.
Boolean evaluation of non-boolean data is strict: 0, "" and [] are all evaluated to true. In ...
Remove elements from collection while iterating
...Book> books = new ArrayList<Book>();
books.add(new Book(new ISBN("0-201-63361-2")));
books.add(new Book(new ISBN("0-201-63361-3")));
books.add(new Book(new ISBN("0-201-63361-4")));
Collect and Remove
The first technique consists in collecting all the objects that we want to delete (e.g. ...
Relative paths based on file location instead of current working directory [duplicate]
... to do is get the absolute path of the script (available via ${BASH_SOURCE[0]}) and then use this to get the parent directory and cd to it at the beginning of the script.
#!/bin/bash
parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
cd "$parent_path"
cat ../some.text
This will make y...
undefined method `source_index' for Gem:Module (NoMethodError)
... What it came down to was ruby-1.9.3-p385 had installed RubyGems version 2.0.2 for me, and 1.9.3-p327 has RubyGems v1.8.23 installed.
Gem.source_index has been deprecated for a while, but since Rails 2.3 is not getting any updates except critical security patches, this will never get fixed. RubyGem...
Django CharField vs TextField
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Cat Plus PlusCat Plus Plus
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Uri to default sound notification?
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edited Jun 30 '12 at 6:54
answered Jun 30 '12 at 6:37
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Difference between framework and static library in xcode4, and how to call them
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The biggest advantage a framework has over static libraries is that they act as a neat way of pa...
Side-by-side plots with ggplot2
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answered Oct 14 '10 at 16:52
David LeBauerDavid LeBauer
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Git command to display HEAD commit id?
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Jorge Ferreira
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answered Dec 28 '09 at 4:44
Randal SchwartzRandal Schwartz
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Difference between Control Template and DataTemplate in WPF
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answered Aug 27 '09 at 10:20
Matt HamiltonMatt Hamilton
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