o

v0.9.6

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5 years ago

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`o` is a curried composition function that returns a unary function.

Utils

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o (

f:Function,

g:Function

) : Function

o is a curried composition function that returns a unary function. Like compose, o performs right-to-left function composition. Unlike compose, the rightmost function passed to o will be invoked with only one argument. Also, unlike compose, o is limited to accepting only 2 unary functions. The name o was chosen because of its similarity to the mathematical composition operator ∘.

Example

const classyGreeting = name => "The name's " + name.last + ", " + name.first + " " + name.last
     const yellGreeting = R.o(R.toUpper, classyGreeting);
     yellGreeting({first: 'James', last: 'Bond'}); //=> "THE NAME'S BOND, JAMES BOND"

     R.o(R.multiply(10), R.add(10))(-4) //=> 60

Arguments

f: Function

g: Function

Returns

Function