this.cells.push({x:i,y:0});
and
this.cells[i].x
what is the importance of x and y and how it is implemented actually.
this.cells.push({x:i,y:0});
and
this.cells[i].x
what is the importance of x and y and how it is implemented actually.
Hey @anitish.225
Welcome to the CB family buddy 
So { x:i, y:0 } is an object where x, y are keys and i, 0 are corresponding values
x, y refer to the co-ordinates on the plane of a particular box
this.cells is the snake array object
this.cells[i] refers to ith box in the snake
this.cells[i].x refers to X co-ordinate of ith box in snake
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Happy Coding !!