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Test if string is a number in Ruby on Rails
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From Rails 'validates_numericality_of': raw_value.to_s =~ /\A[+-]?\d+\Z/
– Morten
Aug 17 '12 at 20:09
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Redis is single-threaded, then how does it do concurrent I/O?
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How do I get whole and fractional parts from double in JSP/Java?
...hole: 3
Fraction: .25
That's it. No need to massage it with help of raw Java code.
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What is the point of function pointers?
...jects) for the same result.
The functors have a number of advantages over raw function pointers, due to their object nature, notably:
They may present several overloads of the operator()
They can have state / reference to existing variables
They can be built on the spot (lambda and bind)
I pers...
How can I read a large text file line by line using Java?
...u can skip the InputStream and use FileReader.
InputStream ins = null; // raw byte-stream
Reader r = null; // cooked reader
BufferedReader br = null; // buffered for readLine()
try {
String s;
ins = new FileInputStream("textfile.txt");
r = new InputStreamReader(ins, "UTF-8"); // leave c...
What is the source code of the “this” module doing?
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Reset the database (purge all), then seed a database
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Jquery Ajax Posting json to webservice
...tive covers why the JSON is being URLEncoded.
I'd advise against passing a raw, manually-serialized JSON string into your method. ASP.NET is going to automatically JSON deserialize the request's POST data, so if you're manually serializing and sending a JSON string to ASP.NET, you'll actually end u...
GitHub relative link in Markdown file
...er relative links on the site.
October 12th, 2011:
If you look at the raw source of the README.md of Markdown itself(!), relative paths don't seem to be supported.
You will find references like:
[r2h]: http://github.com/github/markup/tree/master/lib/github/commands/rest2html
[r2hc]: http://git...