#tech

• Go Installation and Uninstallation on Mac

  Installation

• Ruby in WebAssembly

  There is an official Wasm build of Ruby. It supports WASI and a wide array of features.

• Confusing behavior of File.dirname

  If you are using File.dirname to get the directory path and delete and do some other processing on path, then make sure you consider below use cases.

• Expression Indexes and Operator Classes support for PostgreSQL

  Expression Indexes

• Ecto Custom Validation Elixir Phoenix

  We often need to validate fields that are passed through a struct in Ecto Changesets. Custom validations are very straightforward to write and can be composed with one another easily. By using validate_change/3 which invokes a validator function, the function returns either a) the changeset or b) the changeset with errors if the validation fails.

• String supports Unicode case mappings

  String/Symbol#upcase/downcase/swapcase/capitalize(!) now handle Unicode case mappings instead of only ASCII case mappings

• String#concat, Array#concat and String#prepend Now takes multiple arguments.

  Now String#concat, Array#concat and String#prepend

  • String#concat

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          # Before 2.4.0
    
    

• Binding#irb Start a REPL session similar to binding.pry

  Ruby 2.4.0 introduced new feature for debugging