Creating array of int from array of objects using lodash

Question

I have this array of objects:

this.clients=[{firstName:"Tywin", lastName:"Lannister", age:46, id:2},
              {firstName:"Arya", lastName:"Starck", age:46, id:-1},
              {firstName:"John", lastName:"Snow", age:46, id:12},
              {firstName:"Robb", lastName:"Starck", age:46, id:24}];

And this variable:

var idArr;

I need to iterate threw all objects in array and get all id's and create array from them.Like that:

idArr = [2,-1,12,24]

How can I implement it using lodash?

The lodash examples aren't sufficient to figure this out? Doesn't seem like any research effort was done on this — charlietfl, Jun 11 '16 at 17:05

Pranav C Balan · Answer 1 · 2016-06-11T16:54:34.930

5

Use Array#map method

this.clients=[{firstName:"Tywin", lastName:"Lannister", age:46, id:2},
              {firstName:"Arya", lastName:"Starck", age:46, id:-1},
              {firstName:"John", lastName:"Snow", age:46, id:12},
              {firstName:"Robb", lastName:"Starck", age:46, id:24}];

var idArr = this.clients.map(function(v){ return v.id; })

console.log(idArr);

edited Jun 11 '16 at 16:54

answered Jun 11 '16 at 16:50

Pranav C Balan

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Any idea why I get syntex error on this "=>" – Michael Jun 11 '16 at 16:53
@Michael because arrow functions are ES6 and only supported in strict mode (`'use strict'`) in modern browsers. Check the duplicate question in my comment to your answer for a version with a regular callback function. – t.niese Jun 11 '16 at 16:55
@Michael : it's ES6 arrow function, only works in latest browser.... so answer updated with normal function – Pranav C Balan Jun 11 '16 at 16:55

Creating array of int from array of objects using lodash

1 Answers1