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Pretty print a matrix in ES6
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| "use strict" | |
| function matprint(mat) { | |
| let shape = [mat.length, mat[0].length]; | |
| function col(mat, i) { | |
| return mat.map(row => row[i]); | |
| } | |
| let colMaxes = []; | |
| for (let i = 0; i < shape[1]; i++) { | |
| colMaxes.push(Math.max.apply(null, col(mat, i).map(n => n.toString().length))); | |
| } | |
| mat.forEach(row => { | |
| console.log.apply(null, row.map((val, j) => { | |
| return new Array(colMaxes[j]-val.toString().length+1).join(" ") + val.toString() + " "; | |
| })); | |
| }); | |
| } | |
| // Try it! | |
| let a = [[1,2,3],[4,5555555555555555555555,1],[0.000000000006, 7, 8]]; | |
| matprint(a) | |
| /* | |
| 1 2 3 | |
| 4 5.555555555555556e+21 1 | |
| 6e-12 7 8 | |
| */ |
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