Created
March 27, 2021 01:07
-
-
Save omarbenmegdoul/f3c84b302ccf67c225768df516161b0e to your computer and use it in GitHub Desktop.
someArray.forEach(callback) explainer
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
//This program will log all elements in an array to the console. | |
//forEach is used for DOING something with each element of an array. | |
//Notice that we're not trying to produce a value: we're not getting back a modified array or even a single value at the end. There is no output, just logging. | |
//If you want, you can define the function directly inside the `baseArray.forEach(callback)` call. Literally cut and paste. | |
let baseArray = [1,2,3,4,5,6,7,8,9,0]; | |
baseArray.forEach( | |
function logger(someMessage) { | |
console.log(someMessage); //this is the DOING something part | |
} | |
) | |
//note that since forEach has no output (no return statement) we don't write the following: | |
//finalOutput = baseArray.forEach(...etc... | |
//end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment