Gain insights into metaprogramming in Elixir. Delve into macros and discover how to elevate your coding skills, creating powerful libraries with concise, efficient code.

_Metaprogramming Elixir by The Pragmatic Programmer_468 x 60 copy.png

elixir.tar.gz

elixir

elixir-testing

elixir-copy

Get introduced to the concept of metaprogramming. Learn how to level up your programming skills by discovering the full potential of the macro system in Elixir. Understand the ins and outs of metaprogramming at a fundamental level and write incredible libraries by doing more with less code.

Metaprogramming in Elixir

## Create `unless` macro without using `if`
Define an `unless` macro without using `Kernel.if`, by using other control flow constructs in Elixir.




## Solution
We can use the `cond` control flow structure to recreate the `unless` macro. 
The [cond](https://elixir-lang.org/getting-started/case-cond-and-if.html#cond) construct is equivalent to `else if` clauses in many imperative languages to check different conditions and find the first one that does not evaluate to `nil` or `false`. 

Here's the complete solution to the problem using `cond` construct.




# Create `unless` macro without using `if`
Define an `unless` macro without using `Kernel.if`, by using other control flow constructs in Elixir.




# Solution
We can use the `cond` control flow structure to recreate the `unless` macro. 
The [cond](https://elixir-lang.org/getting-started/case-cond-and-if.html#cond) construct is equivalent to `else if` clauses in many imperative languages to check different conditions and find the first one that does not evaluate to `nil` or `false`. 

Here's the complete solution to the problem using `cond` construct.




See the solution to the coding exercise you tried in the previous lesson.

Introduction

The Language of Macros

Extending Elixir with Metaprogramming

Advanced Compile-Time Code Generation

Code Generation from Git API

How to Test Macros

Create an HTML Domain-Specific Language

With Great Power Comes Great Responsibility (and Fun!)

Try It Out: Solution

Create `unless` macro without using `if`

Solution

Code Generation from Git API

Try It Out: Solution

Create unless macro without using if

Solution

Create `unless` macro without using `if`