CODEWITHSUNDEEP
javascriptfunctional-programmingramda.js
Adam
Adam

Reputation: 3518

How to get Ramda opposite?

How can I can I get opposite value with ramda? I am trying to archive the following: 

R.opposite(true) //false
R.opposite(false) // true

Upvotes: 1

Views: 801

Answers (1)

customcommander
customcommander

Reputation: 18961

As Felix mentioned, you can use not to negate a value:

A function that returns the ! of its argument. It will return true when passed false-y value, and false when passed a truth-y one.

not(true) //=> false

An in case you need to negate the outcome of a function, you can use complement:

Takes a function f and returns a function g such that if called with the same arguments when f returns a "truthy" value, g returns false and when f returns a "falsy" value g returns true.

complement(equals(true))(true) //=> false

Upvotes: 3

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