Add split-second-stopwatch exercise
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| Original file line number | Diff line number | Diff line change |
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| { | ||
| "exercise": "split-second-stopwatch", | ||
| "comments": ["Times are formatted as 'HH:mm:ss'."], | ||
| "cases": [ | ||
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| { | ||
| "description": "new stopwatch", | ||
| "cases": [ | ||
| { | ||
| "uuid": "ddb238ea-99d4-4eaa-a81d-3c917a525a23", | ||
| "description": "starts in ready state", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "state", | ||
| "expected": "ready" | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| }, | ||
| { | ||
| "uuid": "8a892c1e-9ef7-4690-894e-e155a1fe4484", | ||
| "description": "new stopwatch does not have previous laps", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "previousLaps", | ||
| "expected": [] | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| }, | ||
| { | ||
| "uuid": "b19635d4-08ad-4ac3-b87f-aca10e844071", | ||
| "description": "current lap has no elapsed time", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "currentLap", | ||
| "expected": "00:00:00" | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| }, | ||
| { | ||
| "uuid": "492eb532-268d-43ea-8a19-2a032067d335", | ||
| "description": "total has no time elapsed", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "total", | ||
| "expected": "00:00:00" | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| } | ||
| ] | ||
| }, | ||
| { | ||
| "description": "start", | ||
| "cases": [ | ||
| { | ||
| "uuid": "5b2705b6-a584-4042-ba3a-4ab8d0ab0281", | ||
| "description": "changes state to running", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "start" | ||
| }, | ||
| { | ||
| "command": "state", | ||
| "expected": "running" | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| }, | ||
| { | ||
| "uuid": "748235ce-1109-440b-9898-0a431ea179b6", | ||
| "description": "does not change previous laps", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "start" | ||
| }, | ||
| { | ||
| "command": "previousLaps", | ||
| "expected": [] | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| }, | ||
| { | ||
| "uuid": "491487b1-593d-423e-a075-aa78d449ff1f", | ||
| "description": "starts time tracking in current lap", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "start" | ||
| }, | ||
| { | ||
| "command": "advanceTime", | ||
| "seconds": 5 | ||
| }, | ||
| { | ||
| "command": "currentLap", | ||
| "expected": "00:00:05" | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| }, | ||
| { | ||
| "uuid": "a0a7ba2c-8db6-412c-b1b6-cb890e9b72ed", | ||
| "description": "starts time tracking in total", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "start" | ||
| }, | ||
| { | ||
| "command": "advanceTime", | ||
| "seconds": 23 | ||
| }, | ||
| { | ||
| "command": "total", | ||
| "expected": "00:00:23" | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| }, | ||
| { | ||
| "uuid": "7f558a17-ef6d-4a5b-803a-f313af7c41d3", | ||
| "description": "cannot be called from running state", | ||
| "property": "time", | ||
| "input": { | ||
| "commands": [ | ||
| { | ||
| "command": "new" | ||
| }, | ||
| { | ||
| "command": "start" | ||
| }, | ||
| { | ||
| "command": "start", | ||
| "expected": { | ||
| "error": "cannot start an already running stopwatch" | ||
| } | ||
| } | ||
| ] | ||
| }, | ||
| "expected": {} | ||
| } | ||
| ] | ||
| } | ||
| ] | ||
| } | ||
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| # Instructions | ||||||
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| Your task is to build a stopwatch that can be used to keep track of lap times. | ||||||
| The stopwatch has the following functionality: | ||||||
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| - Start: start/resume time tracking | ||||||
| - Stop: stop (pause) time tracking | ||||||
| - Current lap: the time tracked for the current lap | ||||||
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Suggested change
The other list items use a verb to indicate what we're doing with the tracked time.
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| - Previous laps: retrieve the previously recorded lap times | ||||||
| - Reset: stop time tracking, reset the current lap, and clear all previously recorded laps | ||||||
| - Lap: add the current lap time to the previous laps, then reset the current lap time and continue tracking time | ||||||
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| # Introduction | ||
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| As an amateur runner, you've never really felt the need to track your time precisely. | ||
| However, having just enrolled in a local running team, you're now following precisely timed training sessions, each one tuned to the second. | ||
| To allow for more precise time tracking, you've decided to get a _split-second stopwatch_. | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,4 @@ | ||
| title = "Split-second Stopwatch" | ||
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| blurb = "Keep track of time through a digital stopwatch." | ||
| source = "Erik Schierboom" | ||
| source_url = "https://github.com/exercism/problem-specifications/pull/TODO" | ||
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This may not be clear in terms of "What do these letters mean". I mean to say that it may be intuitive that it is hour, minutes, seconds, but why the change in case for hours?
It can be useful to show a time where the
HHis put in place, such as 13:14:15, to show the difference from a 12 hour clock to a twenty four hour clock. To others, it will be clear, but via experience rather than inherent knowledge.There was a problem hiding this comment.
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Fair point! I'll update