Ramda filter

js:

var data = [

 {fname: 'Roy', lname: 'Red'},

 {fname: 'Gary', lname: 'Green'},

 {fname: 'Bob', lname: 'Blue'},

 {fname: 'Roy', lname: 'Rudy', alt: 'Alt'},

];



var dataUpd = R.pipe(

  R.filter(R.propEq('fname', 'Roy')),

  //R.filter(R.prop('alt')),

)(data);



alert( JSON.stringify(dataUpd) );

Result:

Filter all numbers which are more than 5:

const arr = [1,2,3,4,5,6,7,8];

const moreThan5 = n => n > 5;

const resMoreThan5 = R.filter(moreThan5)(arr);

console.log(resMoreThan5);

notEmpty helper:

js:

var data = [

 undefined,

 null,

 '',

 {fname: 'Roy', lname: 'Red'},

 {fname: 'Gary', lname: 'Green'},

 {fname: 'Bob', lname: 'Blue'},

];



var notEmpty = R.complement(R.either(R.isEmpty, R.isNil));



var dataUpd = R.pipe(

  R.filter(notEmpty),

)(data);



alert( JSON.stringify(dataUpd) );

Result: