GarrettAnderson

Explaining a Regular Expression

A regex, which is short for regular expression, is a sequence of characters that defines a specific search pattern. When included in code or search algorithms, regular expressions can be used to find certain patterns of characters within a string, or to find and replace a character or sequence of characters within a string.

Summary

Below we will discuss how to implement a regular expression to find an email matching the search criteria. Using the following, /^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/, I will detail the various components of the regex and explain what is occuring. Regular expressions begin and end with forward slashes, /, in order to indicate the search parameters and define itself as a regex.

Table of Contents

GarrettAnderson

min = 1
max = 100
guess = 0
tries = 0

puts "Please, choose a number between #{min} and #{max}"
# puts "What is your answer"
# answer = gets.chomp
# puts answer

GarrettAnderson

+----------------+----------+-----------------------------+-------------------+-------------+-----------------------+-----------------+
| full_name      | salary   | position                    | phone_extension   | part_time   | parking_spot_number   | department_id   |
|----------------+----------+-----------------------------+-------------------+-------------+-----------------------+-----------------|
| Dedicated Doug | 450      | software developer          | 323               | False       | <null>                | 4               |
| Crazy Carry    | 500      | cook                        | 312               | False       | <null>                | 5               |
| Bashful Berry  | 500      | janitor                     | 553               | False       | <null>                | 3               |
| Gracious Gary  | 500      | instructor                  | 22                | False       | <null>                | 6               |
| Rigid Roger    | 650      | manager                     | 10          

GarrettAnderson

 select * from employees;                                      
+----------------+----------+------------------+-------------------+------------
| full_name      | salary   | position         | phone_extension   | part_time  
|----------------+----------+------------------+-------------------+------------
| Lazy Lynn      | 450      | accountant       | 403               | False      
| Crazy Carry    | 500      | human resources  | 312               | True       
| Rigid Roger    | 650      | management       | 10                | False      
| Gracious Gary  | 500      | dev ops          | 22                | True       
| Terrible Terry | 320      | internal affairs | 212               | False      
+----------------+----------+------------------+-------------------+------------

GarrettAnderson

FILTER OUT THE GEESE
function gooseFilter (birds) {
  var geese = ["African", "Roman Tufted", "Toulouse", "Pilgrim", "Steinbacher"];
  
  // return an array containing all of the strings in the input array except those that match strings in geese
   var filterOutGeese = birds.filter(function(birds) {
    return geese.indexOf(birds) < 0;
   })
   return filterOutGeese;
}

GarrettAnderson

function calculateTip(amount, rating) {
var rating2 = rating.toLowerCase()
  if (rating2 === 'terrible' || rating2 === 'Terrible') {
    var tipPercent = 0.00;
    var totalTip = Math.ceil(amount * tipPercent);
    return totalTip;
  } else if (rating2 === 'poor' || rating2 === 'Poor') {
    var tipPercent = 0.05;
    var totalTip = Math.ceil(amount * tipPercent);
    return totalTip;

GarrettAnderson

const volumeOfCube = (height, volume, width) => {
  let volume = height * volume * width  
  return volume
}