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  1. Prepare
  2. Algorithms
  3. Implementation
  4. Sales by Match
  5. Discussions

Sales by Match

  • bredy452
     + 0 comments

    JS Solution

    let matchMap = {}
    let pairs = 0
    
    ar.forEach(num => {
        if (matchMap[num] === undefined) {
            matchMap[num] = 0
        }
        matchMap[num] += 1
    })
    for (const num in matchMap) {
        if (matchMap[num] > 1) {
           pairs += (Math.floor(matchMap[num] / 2)) 
        }
    }
    return pairs