// What is good code? --> Readable and Scalable. // Scalable is Big O. // Give the instruction to computer --> Output( for example: turn on the light) // As our array grows, our function take longer time to run to finish the task. --> Depend on your CPU and lots of factor affects our runtime. // Big O Notation is the speaking of how long the function is going to run to perform a task --> which one is better in scaling, faster to run const nemo = ['nemo']; function findNemo(array) { let t0 = performance.now(); for (let i = 0; i < array.length; i++) { if (array[i] === 'nemo') { console.log('found NEMO!'); } } let t1 = performance.now(); console.log('Call to find Nemo took ' + (t1 - t0) + 'miliseconds'); } findNemo(nemo);