| function calcPercentage(number) { | |
| // Guard #1: Stop execution if it's not a valie number | |
| if(typeof number !== 'number') { | |
| return 'Please enter valid whole number'; | |
| } | |
| // By this point, you know if will be a valid number | |
| // Guard #2: Stop execution if number is greater than 1 | |
| if (number > 1) { |
| // ❌ You can skip the else block | |
| function calcPercentage(number) { | |
| // Check if valid number | |
| if(typeof number === 'number') { | |
| // Another check: only do calculation number is less than 1 | |
| if (number > 1) { | |
| return 'Number must be less than 1'; | |
| } else { |
| // ❌ You can skip the else block | |
| function hello(name) { | |
| if(name) { | |
| return '👋' | |
| } | |
| else { | |
| return '👻' | |
| } | |
| } |
Author : Samantha Ming
Date : February 03, 2016
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rails new __<project name>__ -d postgresql -T