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Why return NotImplemented instead of raising NotImplementedError
...and related comparison methods are quite commonly used indirectly in list sorts and such. Sometimes the algorithm will choose to try another way or pick a default winner. Raising an exception would break out of the sort unless caught, whereas NotImplemented doesn't get raised and can be used in furt...
How to pass arguments into a Rake task with environment in Rails? [duplicate]
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TLDR;
task :t, [args] => [deps]
Original Answer
When you pass in arguments to rake tasks, you can require the environment using the :needs option. For example:
desc "Testing environment and variables"
task :hello, :message, :needs => :environment do |...
Meaning of …interface{} (dot dot dot interface)
...s (...) is called a variadic parameter. That means you can pass any number or arguments into that parameter (just like with fmt.Printf()). The function will receive the list of arguments for the parameter as a slice of the type declared for the parameter ([]interface{} in your case). The Go Specific...
How do you get a string to a character array in JavaScript?
... "�", "�", "u"] which can lead to dangerous
bugs. See answers below for safe alternatives.
Just split it by an empty string.
var output = "Hello world!".split('');
console.log(output);
See the String.prototype.split() MDN docs.
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What is the difference between functional and non functional requirement? [closed]
...l requirements place constraints on how the system will do so.
Let me elaborate.
An example of a functional requirement would be:
A system must send an email whenever a certain condition is met (e.g. an order is placed, a customer signs up, etc).
A related non-functional requirement for the s...
How to re import an updated package while in Python Interpreter? [duplicate]
I often test my module in the Python Interpreter, and when I see an error, I quickly update the .py file. But how do I make it reflect on the Interpreter ? So, far I have been exiting and reentering the Interpreter because re importing the file again is not working for me.
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Use 'import module' or 'from module import'?
I've tried to find a comprehensive guide on whether it is best to use import module or from module import . I've just started with Python and I'm trying to start off with best practices in mind.
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Using comparison operators in Scala's pattern matching system
...ible to match on a comparison using the pattern matching system in Scala?
For example:
4 Answers
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How to match any non white space character except a particular one?
...r class:
/[^\s\\]/
matches anything that is not a whitespace character nor a \. Here's another example:
[abc] means "match a, b or c"; [^abc] means "match any character except a, b or c".
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How do I do word Stemming or Lemmatization?
I've tried PorterStemmer and Snowball but both don't work on all words, missing some very common ones.
21 Answers
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