callback-pluck
Use callback-pluck instead of
_.pluck
Callback pluck is a callback generator with clean API for ES5 iterations methods.
It allows you to use _.pluck idea in more clean way via generating required
callbacks for iteration methods (map, filter, every and some).
Deprecation note
Use es6 arrow functions instead, they are native and simpler solution.
arr.map(p('age')); // [36, 40, 22, 22]
arr.map(i => i.age); // [36, 40, 22, 22]
Install
npm install --save-dev callback-pluckUsage
var p = require('callback-pluck');
var arr = [
{ 'name': 'Barney', 'age': 36, sex: 'male', married: true },
{ 'name': 'Fred', 'age': 40, sex: 'male', married: true },
{ 'name': 'Glenn', 'age': 22, sex: 'male', married: false },
{ 'name': 'Stephen', 'age': 22, sex: 'male', married: true }
];
Callback pluck with [ ].map
arr.map(p('name')); // ['Barney', 'Fred', 'Glenn', 'Stephen']
arr.map(p('age')); // [36, 40, 22, 22]
Callback pluck with [ ].filter
Simple filtering with string parameter:
arr.filter(p('married')); // [{ 'name': 'Barney', …, married: true },
// { 'name': 'Fred', ¬, married: true },
// { 'name': 'Stephen', …, married: true }]
Simple filtering with string parameter and additional false parameter:
arr.filter(p('married', false)); // { 'name': 'Glenn', …, married: false },
Advanced filtering via property value:
arr.filter(p({ age: 22 })); // [{ 'name': 'Glenn', 'age': 22, … },
// { 'name': 'Stephen', 'age': 22, … }]
Advanced negative filtering via property value and additional false parameter:
arr.filter(p({ age: 22 }, false)); // [{ 'name': 'Barney', 'age': 36, … },
// { 'name': 'Fred', 'age': 40, … }]
Callback pluck with [ ].every
arr.every(p('married')); // false
arr.every(p({ sex: 'male' })); // true
arr.every(p({ married: true })); // false
Callback pluck with [ ].some
arr.some(p('married')); // true
arr.some(p({ married: true })); // true
arr.some(p({ name: 'Barney' })); // true
arr.some(p({ sex: 'female' })); // false
Note
Advanced filtering via property value doesn't do deep equal, It take only
first property from Object.keys(inputObject) to keep logic clean and simple.
License
MIT © Vladimir Starkov
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