Create First-one-to-pass-truth-test.md

This commit is contained in:
Meet Zaveri
2017-12-16 18:03:59 +05:30
committed by GitHub
parent 61aefd1cbc
commit cac8a987ed

View File

@ -0,0 +1,14 @@
### First-one-to-pass-truth-test
A function that looks through an array (first argument) and returns the first element in the array that passes a truth test (second argument).
```
function findElement(arr, func) {
filterArr = arr.filter(func); //filter array with the function provided
return filterArr[0]; //return the first element that returns true, or undefined if no elements return true
}
// test here
findElement([1, 2, 3, 4], function(num){ return num !== 2 && num !== 1 }); //3 <- first element in array to be passed truth test
```