JavaScript 数组操作

function transpose_2d_array(arr) {    var transpose_colnum = arr.length;    var transpose_rownum = arr.at(0).length;    var transpose_arr = [];    for (var i=0; i<transpose_rownum i const col="array.from({" length: transpose_colnum> 0);        transpose_arr.push(col);    }    for (var i=0; i<arr.length i for j="0;" transpose_arr arr return><p><strong>打印数组的形状</strong><br></p><pre class="brush:php;toolbar:false">async function recur_func(arr) {    if (arr != undefined) {        return [arr[0], arr.length];    } else {        return arr;    }}async function shape(arr) {    var out = await recur_func(arr);    var shap = [out[1]];    var c = 0; // typically work with 4D arrays or less    while (out != undefined &amp;&amp; c <p>我希望这些数组实用函数对某人有所帮助。 </p><p>快乐练习！ ?</p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/c1c2c2ed740f" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">Java免费学习笔记（深入）</a>”；</p>