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Oh nice. It seems you can even grow shrink it with unsymmetrical ranges
Thanks @asterite
Yes :-) It's documented here: https://crystal-lang.org/api/1.1.0/Array.html#[]=(range:Range,values:Array(T))-instance-method
Are there functions for extracting the sign and fractional components of floating-point numbers? In some languages you have something like
sign and fract:sign(42.0) # 1.0
sign (-42.0) # -1.0
sign (0.0) # 0.0
fract(42.123) # 0.123
I suppose line 3 can be implemented differently if there is a distinction between IEEE-754 positive and negative zero
last one could just be like
value - (value.floor) probably?
If I have a type with value types (floats) for ivars, is it conventional to call a method which copies it
clone or dup? In this case there is nothing to traverse for a deep copy, but I see some projects use clone in this case, while others use dup, so I'm not sure if there is a consensus.
Maybe I worded it poorly. I was stating that either would be semantically correct for this particular example, and asking if there was a general agreement of which takes preference.
the real use case is to parse a
scope.yml having the properties roots, paths, etc. in a Scope class, I'd like to avoid flow control to check the filters as scope.roots, scope.paths, to something like scope.filters having their own class
I have
Scope with property roots and property paths to pull the data from the file, but what I want when creating the instance is more something like a property filters doing when having roots keys, Root.new(value), etc.
so when filtering, I can just do
scope.filters.all? { |filter| filter.evaluate_with(path) }
like
ScopeFile and using it to create the new Scope with the correct filters
that could do like
Item.new pull.read_string and return that array
I have to re-check if the props are nil, what they are supposed to do etc.
Just saw that you were using the old source in your dependencies
I'll fix the dependency URI.
Am I correct to assume that all optional parameters are also named? That is, there is no such thing as optional positional parameters in this language like I am used to? 😆
Can you give me an example? I've been reading the docs for a few minutes...
would just be a var with a default value
Right. But that can also be invoked with a name, so satisfies the assumption above that all optional parameters are also named?
So I found another library implementing a 2D vector type, and they seem to be using a struct, and have a few methods that are clearly intended to be chained, as they return self (in zero! and normalize!). Is this a bug? I would expect the wrong behavior documented here to occur for subsequent chained calls: https://crystal-lang.org/reference/syntax_and_semantics/structs.html#passing-by-value
Any particular reason why they didn't use a class here do you think? I'm confused why the code as it is written is okay, if it is.