Sheer curiosity.
I’ve asked this question on StackOverflow and I got some answers assuming that this operator is the same one that is used in Java, thus it is probably called the same.
I know. Who cares?
I do.
Is there a proper way to mention the <> (binary concat) operator specific to Elixir? Should I call it the “diamond” operator?
elixir-lang.org: Binaries (and bitstrings)
The string concatenation operation is actually a binary concatenation operator
elixir-lang.org: Binaries, strings and char lists:
Similar results can be achieved with the string concatenation operator <>
Elixir In Action p.46
Because strings are binaries, you can concatenate them with the <> operator
What’s wrong with “binary concatenation” operator? It makes it explicit and leaves no room for confusion.
Sounds good to me 
Can I call it the mini spaceship operator?
As far as I know… the community has the upper hand 
+1 for the spaceship operator.
Maybe the spaceship that concatenates strings
Playfulness aside, “spaceship operator” has already been taken in general by three-way comparison - overloading terms like this rarely enhances clarity (and needlessly further contaminates search engine results).
[If web site content is search engine optimized then maybe technical documentation should be too.]
True. I like the binary concatenation operator, once it is used basically for that.
What’s wrong with binary concatenation operator?
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