A better way to test the value of an Option?
How about if (opt == Some(“lakes”)) This expresses the intent clearly and is straight forward.
code-readability
Is Code For Computers or for People? [closed]
Yes. If the computer doesn’t run it, it’s broken. If people can’t read it, it will be broken. Soon.
How do I align/format code in Android Studio?
Indent code in Android Studio: Windows Ctrl + Alt + L Mac: Option + Command + L
Code-style for indention of multi-line ‘if’ statement? [duplicate]
Often I work around this problem by calculating the condition in an own statement: condition = (collResv.repeatability is None or collResv.somethingElse) if condition: collResv.rejected = True collResv.rejectCompletely() Though, for a still relatively short condition as in your specific example I’d go for nosklo‘s solution – the extra statement used here is more suited for even … Read more
Out of line definition of template function vs in class
There is no difference between the two versions regarding default template arguments, SFINAE or std::enable_if as overload resolution and substitution of template arguments work the same way for both of them. I also don’t see any reason why there should be a difference with modules, as they don’t change the fact that the compiler needs … Read more
Best ways to format LINQ queries
My Formatting: var allInventory = system.InventorySources .Select(src => new { Inventory = src.Value.GetInventory(product.OriginalProductId, true), Region = src.Value.Region }) .GroupBy( i => i.Region, i => i.Inventory ); Notes: Opening parens on methods are never worthy of a new line. Closing parens match the indenting of the line that contains the opening paren. The src => new … Read more
Python list comprehension – want to avoid repeated evaluation
[y for y in (f(x) for x in l) if y] Will do.
What are the benefits to using anonymous functions instead of named functions for callbacks and parameters in JavaScript event code?
I use anonymous functions for three reasons: If no name is needed because the function is only ever called in one place, then why add a name to whatever namespace you’re in. Anonymous functions are declared inline and inline functions have advantages in that they can access variables in the parent scopes. Yes, you can … Read more
How to deal with Pylint’s “too-many-instance-attributes” message?
A linter’s job is to make you aware of potential issues with your code, and as you say in your question, it should not have the last word. If you’ve considered what pylint has to say and decided that for this class, the attributes you have are appropriate (which seems reasonable to me), you can … Read more
Is using java Map.containsKey() redundant when using map.get()
Some Map implementations are allowed to have null values, eg HashMap, in this case if get(key) returns null it does not guarantee that there is no entry in the map associated with this key. So if you want to know if a map contains a key use Map.containsKey. If you simply need a value mapped … Read more