Run a command during map iteration

Help & Support
1

Hi guys, I have a question. How when I perform an iteration via the map command for example, run as well a command ?

Example:

currentDependencies = softwares.map { |entry| entry.toSoftwareDependency}

Basically, everytime the map command is doing the iteration, I would too to execute the command: playCalculationAnimation.

I did something like this, but it don’t work, basically it kill the result of the map:

currentDependencies = softwares.map { |entry| entry.toSoftwareDependency && playCalculationAnimation}

If I remember it will return an empty array

2

#map takes a block, and the { } syntax is just a one-liner alternative for do - end. (Though technically it can replace do-end everywhere)

In your example:

currentDependencies = softwares.map do |entry|
  playCalculationAnimation
  entry.toSoftwareDependency
end

Or alternatively, if the order of execution matters:

currentDependencies = softwares.map do |entry|
  software_dependency = entry.toSoftwareDependency
  playCalculationAnimation

  software_dependency
end

to make sure that the block returns the value that you want.

Unrelated, I recommend following the official coding style, because your current one looks a bit Java-like :stuck_out_tongue:

1 Like
3

This is a good use case for #tap:

currentDependencies = softwares.map do |entry| 
 entry.toSoftwareDependency.tap { playCalculationAnimation }
end
2 Likes
4

Thank you so much ! It work with the method .any? too ?

1 Like