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lens-index

v0.26.1arrow_drop_down
v0.26.1
STATUS
Passing
DOWNLOADS
35
LICENSE
MIT
VISIBILITY
Public
PUBLISHED
8 months ago
SIZE
3 KB
Returns a lens whose focus is the specified index.
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lensIndex (
n:Number
) : Lens

Returns a lens whose focus is the specified index.

Example
const headLens = R.lensIndex(0);

     R.view(headLens, ['a', 'b', 'c']);            //=> 'a'
     R.set(headLens, 'x', ['a', 'b', 'c']);        //=> ['x', 'b', 'c']
     R.over(headLens, R.toUpper, ['a', 'b', 'c']); //=> ['A', 'b', 'c']
Argument
n: Number
Returns
Lens