Add R.adjustAll

I was looking into an alternative for evolve that worked with arrays, but the closest thing I found was adjust. However it only works in a single element. I propose we do something similar to evolve, or a variant of adjust that could take a transform object to apply to difference indexes.

Here is currently my workaround (it won’t work as good as evolve, since it doesn’t account for nesting):

const adjustAll = R.curry((transforms, arr) => {
  
    const newArrEls = Object.keys(transforms)
        .reduce((r, i) => {
            const fn = transforms[i];
            r[i] = fn(arr[i]);
            return r;
        }, {});
  
    return Object.assign(
      [], 
      arr, 
      newArrEls
    );
});

Here is a demo: https://goo.gl/ZbcpJj

What do you guys think?

[Bradcomp]

I wasn’t aware we had a cookbook

This is a common statement. I think we should have a link to the cookbook (or the wiki in general) somewhere on website or in the readme…

[kurtmilam]

I just worked this up in response to a question in the Ramda Gitter:

const evolveArray =
  template =>
    addIndex( map )
            ( ( x, i ) => template[ i ]( x ) )
evolveArray( [ add( 1 ), add( 2 ), add( 3 ) ] )
           ( [ 1, 2, 3 ] )
//->[ 2, 4, 6 ]