function map(f) {
return this.reduce((result, value) => result.concat([ f(value) ]), [])
}
..
var map = (list, f) =>
list.reduce((result, value) => result.concat([ f(value) ]), [])
Not sure I got your motivation, but would this help?
function fn(f) { return f(this) } // provide 'this' as explicit arg
let map = it => f =>
it.list.reduce((result, value) => result.concat([ f(value) ]), [])
let obj = { map: fn(map), list: [1,2,3] }; // wrap map as method
obj.map(x => x+1);
map( {list:[1,2,3]} )(x => x+1);
Claus
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