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How to get rid of punctuation using NLTK tokenizer?

I'm just starting to use NLTK and I don't quite understand how to get a list of words from text. If I use nltk.word_tokenize() , I get a list of words and punctuation. I need only the words instead. How can I get rid of punctuation? Also word_tokenize doesn't work with multiple sentences: dots ar...
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Find size of an array in Perl

...n an array, and of the first character in a substring" (perldoc perlvar). It's set to 0 by default, and setting it to anything other than 0 is highly discouraged. – Keith Thompson Sep 13 '11 at 18:52 ...
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How do I show/hide a UIBarButtonItem?

I created a toolbar in IB with several buttons. I would like to be able to hide/show one of the buttons depending on the state of the data in the main window. ...
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Escaping HTML strings with jQuery

... to escape HTML from strings in jQuery ? I need to be able to pass an arbitrary string and have it properly escaped for display in an HTML page (preventing JavaScript/HTML injection attacks). I'm sure it's possible to extend jQuery to do this, but I don't know enough about the framework at the mo...
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If my interface must return Task what is the best way to have a no-operation implementation?

...e below, due to the interface, the class LazyBar must return a task from its method (and for argument's sake can't be changed). If LazyBar s implementation is unusual in that it happens to run quickly and synchronously - what is the best way to return a No-Operation task from the method? ...
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How to execute an .SQL script file using c#

... EventArgs e) { string sqlConnectionString = @"Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=ccwebgrity;Data Source=SURAJIT\SQLEXPRESS"; string script = File.ReadAllText(@"E:\Project Docs\MX462-PD\MX756_ModMappings1.sql"); SqlConnection conn = new...
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PG::ConnectionBad - could not connect to server: Connection refused

... It could be as simple as a stale PID file. It could be failing silently because your computer didn't complete the shutdown process completely which means postgres didn't delete the PID (process id) file. The PID file is use...
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Sort a single String in Java

Is there a native way to sort a String by its contents in java? E.g. 10 Answers 10 ...
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iFrame src change event detection?

... content in the iframe, is there any way that I can detect a src change in it via the parent page? Some sort of onload maybe? ...
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find: missing argument to -exec

I was helped out today with a command, but it doesn't seem to be working. This is the command: 10 Answers ...