![Joel Thoms on Twitter: "💡TIP: filter and then map will loop through the array twice. This may (or may not) have a performance impact. To loop through the list one time, you Joel Thoms on Twitter: "💡TIP: filter and then map will loop through the array twice. This may (or may not) have a performance impact. To loop through the list one time, you](https://pbs.twimg.com/media/EHK8M62WoAAUuCt.png)
Joel Thoms on Twitter: "💡TIP: filter and then map will loop through the array twice. This may (or may not) have a performance impact. To loop through the list one time, you
![Proful Sadangi on Twitter: "Javascript array functions map filter find reduce https://t.co/L3CmRYQMEM" / Twitter Proful Sadangi on Twitter: "Javascript array functions map filter find reduce https://t.co/L3CmRYQMEM" / Twitter](https://pbs.twimg.com/media/EfdJd2zUEAAP8aE.jpg)
Proful Sadangi on Twitter: "Javascript array functions map filter find reduce https://t.co/L3CmRYQMEM" / Twitter
![Functional Programming in JS: map, filter, reduce (Pt. 5) | by Omer Goldberg | HackerNoon.com | Medium Functional Programming in JS: map, filter, reduce (Pt. 5) | by Omer Goldberg | HackerNoon.com | Medium](https://miro.medium.com/v2/resize:fit:1024/1*FRAwpLpaqSMBV6VOHY_Vdw.png)