You’ve already shown the idiomatic way: for _ in range(n): # or xrange if you are on 2.X foo() Not sure what is “hackish” about this. If you have a more specific use case in mind, please provide more details, and there might be something better suited to what you are doing.
Not sure using find is most elegant or idiomatic, but it is concise and wont throw an IndexOutOfBoundsException. def foo foo = [‘bar’, ‘baz’] assert “bar” == foo?.find { true } foo = [] assert null == foo?.find { true } foo = null assert null == foo?.find { true } —Update Groovy 1.8.1 you … Read more
For some simple actions you can use the safe call operator, assuming the action also respects not operating on an empty list (to handle your case of both null and empty: myList?.forEach { …only iterates if not null and not empty } For other actions. you can write an extension function — two variations depending … Read more
If you use A, you could copy paste your block in python shell, B will get unexpected indentation error.
The problem is simpler than it looks. You convert a rune value to an int value with int(r). But your code implies you want the integer value out of the ASCII (or UTF-8) representation of the digit, which you can trivially get with r – ‘0’ as a rune, or int(r – ‘0’) as an … Read more
I usually write it like this: static String commaSeparated(String[] items) { StringBuilder sb = new StringBuilder(); String sep = “”; for (String item: items) { sb.append(sep); sb.append(item); sep = “,”; } return sb.toString(); }
You don’t need the constant, but I don’t think you can eliminate symbol-to-string: class Example attr_reader :name, :age def initialize args args.each do |k,v| instance_variable_set(“@#{k}”, v) unless v.nil? end end end #=> nil e1 = Example.new :name => ‘foo’, :age => 33 #=> #<Example:0x3f9a1c @name=”foo”, @age=33> e2 = Example.new :name => ‘bar’ #=> #<Example:0x3eb15c @name=”bar”> … Read more
Use fn do_work() -> Result<(), WorkError>. Result<(), WorkError> means you want the work to be done, but it may fail. Option<WorkError> means you want to get an error, but it may be absent. You probably want the work to be done but not to get an error when you write do_work(), so Result<(), WorkError> is … Read more
Use filter: scala> val collection = List(1,2,3,4,5) collection: List[Int] = List(1, 2, 3, 4, 5) // take only that values that both are even and greater than 3 scala> collection.filter(x => (x % 2 == 0) && (x > 3)) res1: List[Int] = List(4) // you can return this in order to check that there … Read more
You can’t have multiple methods with same name in Python. Function overloading – unlike in Java – isn’t supported. Use default parameters or **kwargs and *args arguments. You can make static methods or class methods with the @staticmethod or @classmethod decorator to return an instance of your class, or to add other constructors. I advise … Read more