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  1. Prepare
  2. Data Structures
  3. Arrays
  4. Sparse Arrays
  5. Discussions

Sparse Arrays

  • suraj_raccha
     + 0 comments

    Here is my solution for this problem(java,javascript)

    https://webdev99.com/sparse-arrays-problem-solving-data-structures/

    for detailed solution checkout above article

    java:

    List<Integer> result = new ArrayList<Integer>();
    
    for(int i=0;i<queries.size();i++)
    result.add(Collections.frequency(strings,queries.get(i)));
    
    return result;

    Javascript:

    var result=[];
    let counts={};
    
    for (const str of strings) 
    counts[str] = counts[str] ? counts[str] + 1 : 1;
    
    for(var i=0;i<queries.length;i++)
    if(counts.hasOwnProperty(queries[i]))
    result.push(counts[queries[i]]);
    else
     result.push(0);
    
    return result;

     result.push(0);

return result;```