Since Elixir 1.2, Elixir has had the with macro to assist with more expressive control flow. Instead of deeply nested case and if/else blocks, you can have one single with block to express the same logic but in a more elegant and readable way. I’ll explore how you can utilize with to improve your code. with Basics with works by taking a list of clauses to be matched in order. If all clauses match,
The labels that are jumped to from the select_val match then are checking that the rest of the string matches. The select_val is being generated in label(28)’s block because there is a group of clauses for render_template generated in Phoenix.Template.__before_compile__ My theory is that this is how BEAM makes pattern matching efficient in general: it finds prefixes that can be matched against wit
For many API applications, there comes a time when the application needs to save images uploaded to the server either locally or on a CDN. Luckily for us, Elixir and Phoenix provide the tools we need to build a simple image upload API. The Simple API Let’s define exactly how this API is supposed to work: accept a request containing a base64 encoded image as a field preserve the image extension by
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