Log Lines
10 Points
enumerations
Instructions
In this exercise you'll be processing log-lines.
Each log line is a string formatted as follows: "[<LVL>]: <MESSAGE>".
These are the different log levels:
TRC(trace)DBG(debug)INF(info)WRN(warning)ERR(error)FTL(fatal)
You have three tasks, each of which need to be completed to provide the necessary functionality.
1. Create LogLevel enum
Define a LogLevel enum that has six cases corresponding to the above log levels, plus an unknown case for levels with missing or non-standard log levels.
tracedebuginfowarningerrorfatalunknown
2. Parse log level
Next, implement the LogLevel initializer to parse the log level of a log line:
LogLevel("[INF]: File deleted")
// Returns LogLevel.info
LogLevel("Something went wrong!")
// Returns LogLevel.unknown3. Convert log line to short format
The log level of a log line is quite verbose.
To reduce the disk space needed to store the log lines, a short format is developed: "<ENCODED_LEVEL>:<MESSAGE>".
The encoded log level is simple mapping of a log level to a number:
trace-0debug-1info-4warning-5error-6fatal-7unknown-42
Implement the shortFormat(message: String) -> String method that can output the shortened log line format as a String:
let overflow = LogLevel.error
overflow.shortFormat(message: "Stack overflow")
// Returns "6:Stack overflow"Log Lines
10 Points
enumerations
Instructions
In this exercise you'll be processing log-lines.
Each log line is a string formatted as follows: "[<LVL>]: <MESSAGE>".
These are the different log levels:
TRC(trace)DBG(debug)INF(info)WRN(warning)ERR(error)FTL(fatal)
You have three tasks, each of which need to be completed to provide the necessary functionality.
1. Create LogLevel enum
Define a LogLevel enum that has six cases corresponding to the above log levels, plus an unknown case for levels with missing or non-standard log levels.
tracedebuginfowarningerrorfatalunknown
2. Parse log level
Next, implement the LogLevel initializer to parse the log level of a log line:
LogLevel("[INF]: File deleted")
// Returns LogLevel.info
LogLevel("Something went wrong!")
// Returns LogLevel.unknown3. Convert log line to short format
The log level of a log line is quite verbose.
To reduce the disk space needed to store the log lines, a short format is developed: "<ENCODED_LEVEL>:<MESSAGE>".
The encoded log level is simple mapping of a log level to a number:
trace-0debug-1info-4warning-5error-6fatal-7unknown-42
Implement the shortFormat(message: String) -> String method that can output the shortened log line format as a String:
let overflow = LogLevel.error
overflow.shortFormat(message: "Stack overflow")
// Returns "6:Stack overflow"