![Joel Thoms 🍻 #JavaScript 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 Joel Thoms 🍻 #JavaScript 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](https://pbs.twimg.com/media/EHK8M62WoAAUuCt.png)
Joel Thoms 🍻 #JavaScript 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
![An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks](https://i0.wp.com/css-tricks.com/wp-content/uploads/2019/03/arrays-03.png?ssl=1)
An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks
![Map/filter/reduce (and more) in Swift explained with emoji by – quite brilliant. | Aral Balkan (@aral@m | Scoopnest Map/filter/reduce (and more) in Swift explained with emoji by – quite brilliant. | Aral Balkan (@aral@m | Scoopnest](https://pbs.twimg.com/media/C-HH4O7WsAAjVF6.jpg)
Map/filter/reduce (and more) in Swift explained with emoji by – quite brilliant. | Aral Balkan (@aral@m | Scoopnest
![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/max/1024/1*FRAwpLpaqSMBV6VOHY_Vdw.png)
Functional Programming in JS: map, filter, reduce (Pt. 5) | by Omer Goldberg | HackerNoon.com | Medium
![An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks](https://i0.wp.com/css-tricks.com/wp-content/uploads/2019/03/arrays-01.png?ssl=1)
An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks
![An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods | CSS-Tricks - CSS-Tricks](https://i0.wp.com/css-tricks.com/wp-content/uploads/2019/03/arrays-02.png?ssl=1)