View Source Bonfire.Common (Bonfire v0.9.10-classic-beta.169)

A library of common utils and helpers used across Bonfire extensions.

An extension for Bonfire that contains:

Many common functions in Bonfire.Common.Utils
Path and URL generators in Bonfire.Common.URIs
Date and time helpers in Bonfire.Common.DatesTimes
Etc

Handy commands

Copyright and License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.

Summary

Functions

maybe_fallback(val, fun)

Provides a fallback value or function when the first argument is nil.

Functions

maybe_fallback(val, fun)

Provides a fallback value or function when the first argument is nil.

If the first argument is not nil, returns the first argument as is.
If both arguments are nil, returns nil.
If the first argument is nil and the second argument is a function, calls the function and returns its result.
If the first argument is nil and the second argument is not a function, returns the second argument as is.

Examples

iex> maybe_fallback("value", "fallback value")
"value"

iex> maybe_fallback(nil, nil)
nil

iex> maybe_fallback(nil, fn -> 1+2 end)
3

iex> maybe_fallback(nil, "fallback value")
"fallback value"