const exampleArray = ['aa','bbc','ccdd']; console.log(exampleArray.map(a => a.length)); //Would print out [2,3,4]
materials.map((str) => { const {length} = str; return length; });
const add = (n1, n2) => n1 + n2
const plantNeedsWater = day => day === 'Wednesday' ? true : false; //If only 1 Parameter no () needed //Single line return is implicit //Single line no {} needed