#with > questions

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Questions & Help>Questions

Dbg() in a `with` sequence?

dbg() is one of my favorite Elixir features: placing it somewhere in a pipe of function calls outputs all the intermediate results. It’s ...

#debugging#with

5 830 6

2023-12-27 00:37:18 UTC

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Questions & Help>Questions

How can I access variable defined in "With" statement from its "else" block?

Hello forum! I’m trying to retrieve an updated conn, returned in the first line of a “with” statement, when second line failed. But I’m ...

#with

19 5754 12

2020-07-25 00:25:00 UTC

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Questions & Help>Questions

Proper way of handling simple booleans in `with` statement

Say I have a bunch of simple boolean conditions I want to check in a with statement, something like with true <- is_integer(foo), ...

#with

179 4785 39

2022-05-04 19:10:44 UTC

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Questions & Help>Questions

I can't get Elixir error handling right

In a with case, with many operations, how can i individually handle errors?

#error-handling#with

28 4699 15

2019-07-04 00:30:25 UTC

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Questions & Help>Questions

Function body is nested too deep

I have a case statement that is failing in credo. Giving me this error “Function body is nested too deep” I know we can use “with” here ...

#credo#with

11 3272 4

2021-08-22 13:51:13 UTC

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Easiest way to find the function that didn't match in the `with` statement

I have code like this (but bigger) defmodule WithStacktrace do def hello do with {:ok, _value} <- {:ok, 1}, {:ok, value} ...

#debugging#with

22 3188 10

2022-04-04 17:42:28 UTC

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`with` construct usage question - variables in `else`

I am looking for something like in this simplified example: with\ %{key: true} <- result = a_function_returning_map() do :success e...

#with

4 1628 11

2021-11-12 10:29:05 UTC

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Questions & Help>Questions

Why was equal sign used in with statement?

I read an article on the Dockyard blog and I’m wondering why they used an equal sign with a with statement. The code example is: defm...

#with

19 1724 12

2021-07-14 14:51:20 UTC

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Questions & Help>Questions

With/1 design patterns

When using with/1 to handle a bunch of matches and things that return {:ok, _} or :error or {:error, _} I often need to differentiate bet...

#with

18 1792 12

2018-08-07 13:29:49 UTC

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Questions & Help>Questions

Advice for working around my _only_ problem with "with" expressions - accessing success results

Consider this code: with {:a, first_result} <- {:a, List.first(["apple"])}, {:b, b} <- {:b, %{} |> to_string} do {:ok, ...

#language-implementation#with

23 1210 13

2021-03-01 14:53:52 UTC

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Questions & Help>Questions

How would you accumulate errors?

In “Elixir in Action”, there is an example about using pattern matching with the “with” special form: with {:ok, login} <- ex...

#applicative_functor

4 1071 7

2022-06-06 01:22:04 UTC

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Questions & Help>Questions

Avoiding long `with` blocks

I find myself using a lot of very long with-statements. The functions in the with pipeline return {:ok, result} or some {:error, :error_t...

#with

4 955 3

2021-10-07 14:51:44 UTC

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Questions & Help>Questions

Error handling with "with"

Sort of a newbie code review question, but I’m curious if there’s a way to work around this. I’m still trying to wrap my head around good...

#error-handling#with

12 883 2

2021-08-07 02:24:55 UTC

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Questions & Help>Questions

Weird/incorrect output from a with statement

This is a question that originated on the Elixir Slack from David Billskog and I have made only minor changes to the module. Given this ...

#troubleshooting#with

12 962 13

2020-12-09 23:01:42 UTC

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