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n-grams in python, four, five, six grams?

...parsity. from nltk import ngrams sentence = 'this is a foo bar sentences and i want to ngramize it' n = 6 sixgrams = ngrams(sentence.split(), n) for grams in sixgrams: print grams share | imp...
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How do I get the row count of a pandas DataFrame?

I'm trying to get the number of rows of dataframe df with Pandas, and here is my code. 14 Answers ...
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How do you read from stdin?

...op through all the lines in the input specified as file names given in command-line arguments, or the standard input if no arguments are provided. Note: line will contain a trailing newline; to remove it use line.rstrip() s...
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Pythonic way to check if a list is sorted or not

... edited Jan 29 '18 at 14:08 Andreas Haferburg 4,42311 gold badge2424 silver badges4949 bronze badges answered Sep 20 '10 at 20:33 ...
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How can I sanitize user input with PHP?

...tion somewhere that works well for sanitizing user input for SQL injection and XSS attacks, while still allowing certain types of HTML tags? ...
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Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?

... As far as I know, there are only two kinds of functions, destructive and constructive. While constructive function, as the name implies, constructs something, a destructive one destroys something, but not in the way you may think now. For example, the function Function<Integer,Integer&g...
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How to select a single field for all documents in a MongoDB collection?

... MongoDB, I have a student collection with 10 records having fields name and roll . One record of this collection is: 1...
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config.assets.compile=true in Rails production, why not?

...or a file in /assets is passed to Sprockets. On the first request for each and every asset it is compiled and cached in whatever Rails is using for cache (usually the filesystem). On subsequent requests Sprockets receives the request and has to look up the fingerprinted filename, check that the fil...
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BigDecimal - to use new or valueOf

... Those are two separate questions: "What should I use for BigDecimal?" and "What do I do in general?" For BigDecimal: this is a bit tricky, because they don't do the same thing. BigDecimal.valueOf(double) will use the canonical String representation of the double value passed in to instantiate ...
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Redis strings vs Redis hashes to represent JSON: efficiency?

...e cases): Store the entire object as JSON-encoded string in a single key and keep track of all Objects using a set (or list, if more appropriate). For example: INCR id:users SET user:{id} '{"name":"Fred","age":25}' SADD users {id} Generally speaking, this is probably the best method in most cas...