基于比分字段生成三种比赛结果判定公式的技术需求

I have this state data containing match information, and I need to write a formula to determine the match result based on the score field (like '3:0'). The rules are:

• If the first number in the score is greater than the second → result is 'won'
• If they are equal → result is 'drew'
• If the first number is less than the second → result is 'loss'

Here's my existing data:

state = {
  data: [
    createData('23 May 2017', 'Seniors', 'Brazil', '90 mins', '3:0'),
    createData('14 May 2017', 'Seniors', 'Italy', '45 mins', '0:0'),
    createData('14 Nov 2016', 'Seniors', 'Germany', '0 mins', '0:2')
  ],
};

Step 1: Build a helper function to parse scores and return results #

Let's start with a reusable function that takes a score string, breaks it down, and applies your rules. It handles basic edge cases too, like malformed score formats:

function getMatchResult(score) {
  // Split the score string, trim any extra spaces, and convert to numbers
  const [ourScore, opponentScore] = score.split(':').map(s => Number(s.trim()));
  
  // Handle invalid score formats (optional but useful)
  if (isNaN(ourScore) || isNaN(opponentScore)) {
    return 'invalid'; // Adjust this to your error handling needs
  }
  
  // Apply the result logic
  if (ourScore > opponentScore) {
    return 'won';
  } else if (ourScore === opponentScore) {
    return 'drew';
  } else {
    return 'loss';
  }
}

Step 2: Apply the function to your existing match data #

You can use Array.map() to attach the result to each entry in your state.data array. Assuming each object returned by createData includes a score property (the fifth parameter), here's how to update your data:

// Add the result to each match entry
const matchesWithResults = state.data.map(match => ({
  ...match,
  result: getMatchResult(match.score)
}));

// Check the output
console.log(matchesWithResults);

Example Output for Your Sample Data #

Running this code would generate results like:

• Brazil match → 'won'
• Italy match → 'drew'
• Germany match → 'loss'

Quick Notes #

• If your score strings might have inconsistent spacing (like '3 : 0'), the .trim() in the helper function ensures numbers are parsed correctly.
• The 'invalid' return value is optional—feel free to replace it with an empty string, null, or custom error message if needed.

内容的提问来源于stack exchange，提问作者Tom Rudge