anger _in progress

 I keep seeing these memes

that anger is a good emotion.
on to some extent I agree. Anger is a reaction to something. 
When some one hurts you, it's natural to feel angry.
When my father died, I was angry with him. And that felt pretty stupid. 
Dead men don't really give a damn if you're angry with them.
Anger can reveal when someone is manipulating you.
When some one is trying to use shame or guilt to control you
When you realize you've been deceived.
When you see a double standard applied in the expectations put on you.

I've seen another meme

"Explain your anger instead of expressing it and you will find solutions instead of arguments"

I feel like that might need some extra unpacking. 
It isn't entirely specific WHO you're explaining your anger to.
And it presumes that if you're explaining your anger to another person
that they will have the desire to understand and cooperate with you
to find solutions to the root cause of the anger.
It also presumes that you have enough self awareness and a sufficient vocabulary 
to articulate your anger, it presumes you have the emotional maturity to process
your emotions in a healthy manner, then enough self control to verbalize what
behaviors, words, gestures, triggers, expectations, or unmet needs got you 
to the place of becoming angry in the first place. 
And to presume that any of that can happen, while someone is enraged, seems a bit
counter intuitive. 

I've encountered the mentality 
that with anger there's only two options
expression or suppression
explanation is a third as expressed in the meme
transformation is a forth
Processing seems like a reasonable step
perhaps explaining your anger to yourself first
Is more productive than explaining it to another person right away. There's tremendous power in anger, it can be discerning, illuminating truth from fiction. It can be motivating, fueling action, it has an element of impulse that sparks motion whether creative or destructive. Like any strong emotion, anger has great potential, for harm as well as growth.