Host Log Parser
Verkada● MediumFULLTIMEPHONE SCREENProblem statement
Parse host log lines into structured fields while processing each line from left to right.
A non-blank line begins with either a no-space ISO timestamp or a timestamp in the form YYYY-MM-DD HH:mm:ss.SSS. The remainder contains whitespace-delimited key=value fields. Keys contain only letters, digits, underscore, dot, or hyphen. An unquoted value ends at whitespace. A quoted value may contain spaces and equal signs, supports \" as an escaped quote, and may be empty.
For every non-blank line, return one row whose first element is the complete timestamp and whose remaining elements are normalized key=value strings in source order. Remove surrounding quotes and replace each escaped quote with a literal quote. Skip blank lines.
Function
parseHostLogs(lines: String[]) → String[][]Examples
Example 1
lines = ["2026-09-29T10:20:30Z host=api-1 status=ok","2026-09-29 10:20:31.123 msg=\"retry later\" code=503"]return = [["2026-09-29T10:20:30Z","host=api-1","status=ok"],["2026-09-29 10:20:31.123","msg=retry later","code=503"]]The second timestamp spans two tokens, while the quoted message remains one value.
Example 2
lines = ["2026-01-01T00:00:00Z note=\"a=b and \\\"quoted\\\"\" empty=\"\""]return = [["2026-01-01T00:00:00Z","note=a=b and \"quoted\"","empty="]]Equal signs and escaped quotes inside a quoted value are preserved.
Example 3
lines = [""," ","2026-05-06 07:08:09.010 a=1\tb=two"]return = [["2026-05-06 07:08:09.010","a=1","b=two"]]Blank lines are skipped and tabs delimit fields.
Constraints
0 <= lines.length <= 100000.- Each line has at most
10000characters. - Every non-blank line follows the stated grammar.
- Fields are separated by one or more spaces or tabs.