objHas.js

Takes object then returns fn that checks if prop is on object.

const hop = o => p => o.hasOwnProperty(p)

Takes a(rray) and c(all)b(ack) then calls the cb on array items.

const fe = (a, cb) => {for (let i=0; i<a.length; i++) { cb(a[i]) }}

• Takes o(bject) and p(rop)s and returns a Bool.
  • Object: Look for nested properties on this.
  • Props: One or many Strings used to search the object.
  • Bool: If depth reached and value of final prop is truthy.

module.exports = function (o, ...ps)
{

Error variable to determine if a nested property wasn’t found.

  let e

• While we have props to check, check each prop
  • Obj defined and has prop reassign it with new val
  • Obj not defined or does not have prop set error to true

  fe(ps, p => o && hop(o)(p) ? o = o[p] : e = true)

• Encountered an error?
  • If so then return false
  • Else double check o value
    • If o happens to be truthy return true
    • Else return false

  return e ? false : (o ? true : false)
}