src/lill.js
function func$withContext(fn, item, i, ctx) { // eslint-disable-line max-params
	return fn.call(ctx, item, i)
}
function func$withContext(fn, item, i, ctx) { // eslint-disable-line max-params
	return fn.call(ctx, item, i)
}
function func$withContext ( fn , item , i , ctx ) { // eslint-disable-line max-params return fn . call ( ctx , item , i ) }
bit slower to use call when changing context
bit slower to use call when changing context