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JavaScript Object-Oriented JavaScript: Challenge Building Constructor Methods and Generating Objects createSpaces() Method Solution

Posted by Muhammad Ali
Muhammad Ali
6,752 Points

why Do we need to come up With an Extra Temporary List

why Do we need to come up With an Extra Temporary List why cant we directly append the space object within the nested for Loop.like this

 spaces(row1,columns1){
        let spaces=[];
        for(let r=0;r<row1;r++)
        {

            for(let c=0;c<columns1;c++)
            {
                spaces.push((new Token(r,c)));
            }

        }
        return spaces;    
    }

1 Answer

Eugene Dianov
Eugene Dianov
4,264 Points
Eugene Dianov
Eugene Dianov
4,264 Points

Because we want to create a two-dimensional array. Your code creates a one-dimensional array.

Alternatively solution

createSpaces() {

let spaces = [[]];

for (let i = 0; i < this.rows; i++) {
  spaces[i] = [];
  for (let j = 0; j < this.columns; j++) {
    spaces[i][j] = new Space(i, j);
  }
}
return spaces;

}