object-mfr v1.0.7

object-mfr

Do a map, filter or reduce operation on object enumerable properties

Usage

Object = require('object-mfr')();
// or
require('object-mfr')(Object);

let family = {
    father: 'Homer',
    mother: 'Marge',
    son: 'Bart',
    daughter: 'Lisa',
    name: 'Simpson'
};

let caller = {
    greeting: "Hello"
};

// do function on every property
family.map(function(val, key, obj){
    console.log(`${this.greeting} ${val}! (${obj.name}'s ${key})`);
}, caller);

// keep only properties for which function returns true
family.filter(function(val, key, obj){
    return val.indexOf('a') !== -1
});

// do function on every property 
// with passed a function previous result
let initialValue = `Simpsons with "a":`;
let result = family.reduce(function(previousValue, val, key, obj){
    return previousValue+' '+val;
}, initialValue);

console.log(result);

// Hello Homer! (Simpson's father)
// Hello Marge! (Simpson's mother)
// Hello Bart! (Simpson's son)
// Hello Lisa! (Simpson's daughter)
// Hello Simpson! (Simpson's name)
// Simpsons with "a": Marge Bart Lisa