Ramda JS Tutorial – Part 36 (empty + Monoid + Semigroup)

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What is a Monoid? And how do you get its identity element?

Exploring all the functions of the JavaScript library Ramda JS and learning functional programming along the way.

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👾 In this video:
R.empty
Monoid
Semigroup
empty
concat

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Hey Christopher. I believe at 21:00, as part of the "isArguments(x)", ramda just samples the value of "arguments" of an empty function call, which makes sense, since the "empty" function is supposed to return the empty equivalent of the data that's being passed in. So if you pass in arbitrary arguments, then an empty argument list is what corresponds to that. Maybe that makes sense.

tamaspal

string is a list of chars with concat and length ... just like array, you can do Array.from("string")

zeocamo

Great video Christopher. As all your Ramda stuff! Will you produce more on those FP stuff like Fantasy types?

dalailama

you can do Set(), null, 2)) to see the inner of a object

zeocamo

remember to make pure function and Immutable data in FP :)

zeocamo

you can't that why ramda get (function() { return arguments}()) in the docs you was reading

zeocamo

you should look at typescript.... maybe be good for you

zeocamo

interesting topic... but why does the video has to be over an hour long ? maybe try to trim it to 5-10 minutes for each topic (empty, monoid, semigroup) .. because it does not look like people have patience to watch it all.

KostiantynVesna

Ramda JS Tutorial – Part 36 (empty + Monoid + Semigroup)

Ramda JS Tutorial – Part 2 (addIndex, adjust)

Ramda JS Tutorial – Part 1 (__, curry, add)

Ramda JS Tutorial – Part 5 (ap)

Ramda JS Tutorial – Part 23 (construct, constructN)

Ramda JS Tutorial – Part 3 (all, allPass)

Ramda JS Tutorial – Part 25 (converge)

Ramda JS Tutorial – Part 6 (aperture, append, apply, unapply)

Ramda JS Tutorial – Part 8 (ascend, descend, sort)

Ramda JS Tutorial – Part 39 (T, F)

Ramda JS Tutorial – Part 24 (contains)

Ramda JS Tutorial – Part 27 (curry)

Ramda JS Tutorial – Part 11 (bind, call, apply)

Ramda JS Tutorial – Part 10 (binary, unary, nAry)

Ramda JS Tutorial – Part 36 (empty + Monoid + Semigroup)

Ramda JS Tutorial – Part 30 (difference, intersection, union, symmetric difference)

Ramda JS Tutorial – Part 12 (both, flip)

Ramda JS Tutorial – Part 22 (cond / switch case)

Ramda JS Tutorial – Part 39 (evolve)

Ramda JS Tutorial – Part 4 (always, and, any, anyPass)

Ramda JS Tutorial – Part 19 (compose and pipe)

Cleaner code with pipe | functional programming in javascript (with Ramda.JS) (part 2)

Ramda JS Tutorial – Part 17 (comparator)

Ramda JS Tutorial – Part 28 (inc, dec)

Ramda JS Tutorial – Part 15 (clamp)