Return Multiple specific Items in an array by index-CodePudding

I have an array of diagnoses, all of which have specific indexes as seen below from the console:

{M24.2: {…}, M51.2: {…}, S03.5: {…}, J10.1: {…}, J06.9: {…}, …}
F43.2
: 
{code: 'F43.2', name: 'Adjustment disorders', latin: 'Perturbationes adaptationis'}
H35.29
: 
{code: 'H35.29', name: 'Other proliferative retinopathy', latin: 'Alia retinopathia proliferativa'}
H54.7
: 
{code: 'H54.7', name: 'Unspecified visual loss', latin: 'Amblyopia NAS'}
J03.0
: 
{code: 'J03.0', name: 'Streptococcal tonsillitis', latin: 'Tonsillitis (palatina) streptococcica'}
J06.9
: 
{code: 'J06.9', name: 'Acute upper respiratory infection, unspecified', latin: 'Infectio acuta respiratoria superior non specificata'}
J10.1
: 
{code: 'J10.1', name: 'Influenza with other respiratory manifestations, other influenza virus codeentified', latin: 'Influenza cum aliis manifestationibus respiratoriis ab agente virali codeentificato'}
L20
: 
{code: 'L20', name: 'Atopic dermatitis', latin: 'Atopic dermatitis'}
L60.1
: 
{code: 'L60.1', name: 'Onycholysis', latin: 'Onycholysis'}
M24.2
: 
{code: 'M24.2', name: 'Disorder of ligament', latin: 'Morbositas ligamenti'}
M51.2
: 
{code: 'M51.2', name: 'Other specified intervertebral disc displacement', latin: 'Alia dislocatio disci intervertebralis specificata'}
N30.0
: 
{code: 'N30.0', name: 'Acute cystitis', latin: 'Cystitis acuta'}
S03.5
: 
{code: 'S03.5', name: 'Sprain and strain of joints and ligaments of other and unspecified parts of head', latin: 'Distorsio et/sive distensio articulationum et/sive…m partium aliarum sive non specificatarum capitis'}
S62.5
: 
{code: 'S62.5', name: 'Fracture of thumb', latin: 'Fractura [ossis/ossium] pollicis'}
Z57.1
: 
{code: 'Z57.1', name: 'Occupational exposure to radiation'}
Z74.3
: 
{code: 'Z74.3', name: 'Need for continuous supervision'}
[[Prototype]]
: 
Object

I have an array of codes stored in the variable below:

const codes = ['Z57.1', 'Z74.3', 'M51.2']

How would I only return the diagnoses that have the indexes listed in the variable "codes"?

Expected result would be:

  Z57.1
    {code: 'Z57.1', name: 'Occupational exposure to radiation'}
    Z74.3
    : 
    {code: 'Z74.3', name: 'Need for continuous supervision'}
   M51.2
    : 
    {code: 'M51.2', name: 'Other specified intervertebral disc displacement', latin: 'Alia dislocatio disci intervertebralis specificata'}

I have tried

codes.map(d => diagnoses[d]) but this didn't work.

CodePudding user response：

Your map() should work, but it will return an array, not an object. You can use reduce() to convert that back to an object using the code properties as the keys.

result = codes.map(d => diagnoses[d])
        .reduce((a, diagnosis) => (a[diagnosis.code] = diagnosis, a), {});