exercism/elixir/log-parser/HINTS.md

Hints

General

• Review regular expression patterns from the introduction. Remember, when creating the pattern a string, you must escape some characters.
• Read about the Regex module in the documentation.
• Read about the regular expression sigil in the Getting Started guide.
• Check out this website about regular expressions: Regular-Expressions.info.
• Check out this website about regular expressions: Rex Egg - The world's most tyrannosauical regex tutorial.
• Check out this website about regular expressions: RegexOne - Learn Regular Expressions with simple, interactive exercises.
• Check out this website about regular expressions: Regular Expressions 101 - an online regex sandbox.
• Check out this website about regular expressions: RegExr - an online regex sandbox.

1. Identify garbled log lines

• Use the r sigil to create a regular expression.
• There is an operator that can be used to check a string against a regular expression. There is also a Regex function and a String function that can do the same.
• Don't forget to escape characters that have special meaning in regular expressions.

2. Split the log line

• There is a Regex function as well as a String function that can split a string into a list of strings based on a regular expression.
• Don't forget to escape characters that have special meaning in regular expressions.

3. Remove artifacts from log

• There is a Regex function as well as a String function that can change a part of a string that matches a given regular expression to a different string.
• There is a modifier that can make the whole regular expression case-insensitive.

4. Tag lines with user names

• There is a Regex function that runs a regular expression against a string and returns all captures.