gistfile1.md

Title (Tutorial on Matching a URL with Regular Expressions)

This is a tutorial on building a URL search with a regular expression. This will cover part or most of the syntax.

Summary

I will be describing the syntax of a regular expression provided by the Challenge 17 documentation. The following code snippet is from the readme.md file which describes searching for a matching email using a regular expression: /^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/

Table of Contents

• Anchors
• Quantifiers
• Grouping Constructs
• Bracket Expressions
• Character Classes
• The OR Operator
• Flags
• Character Escapes

Regex Components

^ is a carrot ? is zero or one () Parenthesis in this context is used for grouops \d is for numbers [] brackets are to match character classes

• is to match one or more { } curly brackets is the range in length . is to match a literal period

• is to match all ?$ is to match a zero or one groups

Anchors

Quantifiers

There are two quantifiers * seen

Grouping Constructs

There are four () groups seen

Bracket Expressions

Brackets are used to find any charaters a through z upper and lower And used to find digits zero through nine

Character Classes

Chater classes are the text that are within the bracket

The OR Operator

Alterations {2 through 6} are used to find the length

Flags

Character Escapes

Author

Sidney Basa From Seattle Washington Security Guard for Hospitals Studying Software Programming Was a student at the University of Washington Seattle campus in 2012 has two associates degrees at Seattle Community College Assosicates of Arts Associates of Science in Diesel and Heavy Machinery

https://github.com/SidneyBasa