This a code a made to move rows in a (3*3) matrix.
const transY =(arr)=> {
const arrtY = [];
for (let i = 1; i < 4; i++) {
for (let j = 0; j < 3; j++) {
if (i==3) {
return arrtY.unshift(arr[3*0+j]);
}
return arrtY.push(arr[3*i+j]);
}
}
return arrtY;
}
Expected output (in an array) :
1 2 3 7 8 9 4 5 6
4 5 6 ==> 1 2 3 ==> 7 8 9 ==> [...]
7 8 9 4 5 6 1 2 3
When I log arrtY in the console I only see 1.
Here's a solution
const transY =(arr)=> {
const arrtY = [];
function rowpush(i) {
for (let j = 0; j < 3; j++) {
arrtY.push(arr[3*i+j]);
}
}
rowpush(2);
rowpush(0);
rowpush(1);
return arrtY;
}
Possible solution:
function transform(arr) { var res = []; for(var i = 6; res.length < 9; i = (i + 1) % 9) res.push(arr[i]); return res; } var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]; console.log(JSON.stringify(arr)) arr = transform(arr); console.log(JSON.stringify(arr)) arr = transform(arr); console.log(JSON.stringify(arr))
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