elelad / at-calculator

Calculator

Working example here: https://elelad.github.io/at-calculator/

Calculation Logic

The calculation works based on those steps:

• Split the equation string based on the operators + or - with regex
• If the equation string contains * or / calculates them first and replace their location in the array with the result
• Now we have only +, - operators and numbers, we can calculate using iteration on the array

For example, the equation string is: 2+3*2-1

• The split will give us this array: ['2','+','3*2','-','1']
• In the next step, we will calculate the 3*2 and replace this string in the array with the result.
• Now we have the following array: ['2','+','6','-','1']
• We iterate on the array and adding or subtracting based on the operator

Run locally

• Run npm i
• If you get any errors try to delete the package-lock.json and the node_modules and install again.
• Run ng serve for a dev server. Navigate to http://localhost:4200/.

Run unit tests

Run ng test to execute the unit tests via Karma.

Deploy

• Run ng build --output-path docs --base-href /at-calculator/
• Make a copy of docs/index.html and name it docs/404.html