gistfile1.txt

row = [];// outer array

for (product in productsArray) {
  innerArray = []; // inner array
  
  if (product.image is large)  {
    array add product;
  } else if (product image is small) {
      把row 数组的最后一个拿出来，看看
      如果只有一个，还是large image，我们就不管了
      
      如果只有一个，还是小image，我们就把当前的product 加进去。
    }
  }

 row add innerArray;
}

rows = [];
smallImageArray = [];
for (product in products) {
    largeImageProducts = [];

    if (product image is large) {
        [largeImageProducts addObject:product];
       [rows addObject:largeImageProducts];
    } else {
        if (smallImageProducts.count < 2) {
            [smallImageProducts addObject:product];
        } else {
            smallImageProducts = [];
            [smallImageProducts addObject:product];
        }

       [rows addObject:lsmallImageArray];
    }
}

rows = [];// outer array

for (product in productsArray) {
  line = []; // inner array

  if (product.image is large)  {
    line.append(product);
  }

  else if (product.image is small) {

    if (rows.last().length === 1) {
      if (rows.last()[0].image is small) {

        if (product._bb_group) {
          if (product._bb_group) {
            rows.append(product._bb_group);
          }
          line.append(product);
        } else {
          rows.last().append(product);
          continue;
        }
      } eles {
        if (product._bb_group) {
          rows.append(product._bb_group);
        }
        line.append(product);
      }
    } else {
      if (product._bb_group) {
        rows.append(product._bb_group);
      }
      line.append(product);
    }
  }

 rows.append(line);
}

rows = [];// outer array

for (product in productsArray) {
  line = []; // inner array

  if (product.image is large)  {
    line.append(product);
  }

  else if (product.image is small) {

    if (rows.last().length === 1) {
      if (rows.last()[0].image is small) {

        if (product._bb_group) {
          line.append(product);
        } else {
          rows.last().append(product);
          continue;
        }
      } eles {
        line.append(product);
      }
    } else {
      line.append(product);
    }
  }

 rows.append(line);
}