Filtering array of objects with lodash based on property value

Question

We have an array of objects as such

var myArr = [ {name: "john", age: 23},               {name: "john", age: 43},               {name: "jim", age: 101},               {name: "bob", age: 67} ]; 

how do I get the list of objects from myArr where name is john with lodash?

Answer 1

Use lodash _.filter method:

_.filter(collection, [predicate=_.identity]) 

Iterates over elements of collection, returning an array of all elements predicate returns truthy for. The predicate is invoked with three arguments: (value, index|key, collection).

with predicate as custom function

 _.filter(myArr, function(o) {      return o.name == 'john';   }); 

with predicate as part of filtered object (the _.matches iteratee shorthand)

_.filter(myArr, {name: 'john'}); 

with predicate as [key, value] array (the _.matchesProperty iteratee shorthand.)

_.filter(myArr, ['name', 'John']); 

Docs reference: https://lodash.com/docs/4.17.4#filter