遍历多维数组javascript

Question

I was wondering how can I get the multidimensional array like [[A1, B1, C1....],[A2, B2, C2....]];

 let grid = [ [] ]; let letters = "abcdefghij".toUpperCase(); // create the Grid const createGrid = (size) => { let row = 0; let col = 0; for (row = 0; row < size; row++) { grid[row] = []; for (col = 0; col < letters.length; col++) { grid[row][col] = `${letters[row]}${col + 1}`; } } }; createGrid(letters.length); console.log(grid);

Answer 1

If you don't mind converting your code to ES6+, this one should do the trick.

 const letters = "abcdefghij".toUpperCase(); const createGrid = (letters) => Array.from( { length: letters.length }, (_, index) => [...letters].map((letter) => `${letter}${index + 1}`) ); console.log(createGrid(letters));

Answer 2

Just refer the col instead of the row and concat the row + 1 to it in the inner loop when you are doing the assignment.

 let grid = [ [] ]; let letters = "abcdefghij".toUpperCase(); // create the Grid const createGrid = (size) => { let row = 0; let col = 0; for (row = 0; row < size; row++) { grid[row] = []; for (col = 0; col < letters.length; col++) { // instead of grid[row][col] = `${letters[row]}${col + 1}`; grid[row][col] = `${letters[col]}${row + 1}`; } } }; createGrid(letters.length); console.log(grid);