davidfurlong/conditional_js_property.js

## conditional_js_property.js
const _ = (obj, cond = (val) => typeof val === 'undefined' || val === null) =>
  Object.assign({},
    ...(Object.keys(obj).map(key =>
      cond(obj[key]) ? {} : {
        [key]: obj[key]
      })
    )
  );

/*

var d;
_({d, a: null, c: 10, d: false})
===
Outputs =>
===
Object {d: false, c: 10}

*/
	const _ = (obj, cond = (val) => typeof val === 'undefined' \|\| val === null) =>
	Object.assign({},
	...(Object.keys(obj).map(key =>
	cond(obj[key]) ? {} : {
	[key]: obj[key]
	})
	)
	);

	/*

	var d;
	_({d, a: null, c: 10, d: false})
	===
	Outputs =>
	===
	Object {d: false, c: 10}

	*/