drop-last-while

v0.9.6

STATUS

Passing

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VISIBILITY

Public

PUBLISHED

5 years ago

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2 KB

Returns a new list excluding all the tailing elements of a given list which satisfy the supplied predicate function.

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dropLastWhile (

predicate:Function,

xs:Array

) : Array

Returns a new list excluding all the tailing elements of a given list which satisfy the supplied predicate function. It passes each value from the right to the supplied predicate function, skipping elements until the predicate function returns a falsy value. The predicate function is applied to one argument: (value).

Acts as a transducer if a transformer is given in list position.

Example

const lteThree = x => x <= 3;

     R.dropLastWhile(lteThree, [1, 2, 3, 4, 3, 2, 1]); //=> [1, 2, 3, 4]

     R.dropLastWhile(x => x !== 'd' , 'Ramda'); //=> 'Ramd'

Arguments

predicate: Function

The function to be called on each element

xs: Array

The collection to iterate over.

Returns

Array

A new array without any trailing elements that return `falsy` values from the `predicate`.