object filtering javascript code example

Example 1: javascript object filter

function objectFilter = (obj, predicate) => 
    Object.keys(obj)
          .filter( key => predicate(obj[key]) )
          .reduce( (res, key) => (res[key] = obj[key], res), {} );

// Example use:
var scores = {
    John: 2, Sarah: 3, Janet: 1
};

var filtered = objectFilter(scores, num => num > 1); 
console.log(filtered);

Example 2: js filter object

/** filter object by key or value */

/** filter object function */
function filterObj( obj, predicate ) {
	var result = {}, key;

	for ( key in obj ) {
		if ( obj.hasOwnProperty( key ) && predicate( key, obj[ key ] ) ) {
			result[ key ] = obj[ key ];
		}
	}

	return result;
};

// example

// set object
var obj = {
	name : 'john',
	lastName : 'smith',
	age : 32
}

// filter out parameters using key and value
var filteredObj = filterObj( obj, function( key, value ) {
	return key !== 'age' && value !== 'smith'
});

// show result
console.log( filteredObj ); // { name: "john" }