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[英]Google Spreadsheet Script - How to Transpose / Rotate Multi-dimensional Array?
[英]How to print the following Multi-Dimensional array in Java Script?
我有以下數組(代碼是用 Java 編寫的):
String[][] a = new String[3][2];
a[0][0] = "1";
a[0][1] = "2";
a[1][0] = "1";
a[1][1] = "2";
a[2][0] = "1";
a[2][1] = "2";
我想做的是打印 111222,我通過這樣做在 Java 中完成了它:
for (int i=0;i < a[i].length;i++){
for(int j=0;j <a.length;j++){
System.out.print(a[j][i]);
}
}
這在 JavaScript 中相當於什么?
這是Javascript中的等效代碼(沒有空格,它不是java的腳本版本)
! 編輯錯過了循環的細節,現在修復
var a = [];
a.push(["1", "2"]);
a.push(["1", "2"]);
a.push(["1", "2"]);
for(var i = 0; i < a[i].length; i++) {
for(var z = 0; z < a.length; z++) {
console.log(a[z][i]);
}
}
for (i=0; i < a.length; i++) {
for (j = 0; j < a[i].length; j++) { document.write(a[i][j]); }
}
雖然將所有字符串添加到一起並將它們打印為一個可以更聰明(可以添加到元素或提醒它。)
// first array equivalent to rows let a = new Array(3); // inner array equivalent to columns for(i=0; i<a.length; i++) { a[i] = new Array(2); } // now assign values a[0][0] = "1"; a[0][1] = "2"; a[1][0] = "1"; a[1][1] = "2"; a[2][0] = "1"; a[2][1] = "2"; /* console.log appends new line at end. So concatenate before printing */ let out=""; for(let i=0; i<a.length; i++) { for(let j=0; j<a[i].length; j++) { out = out + a[i][j]; } } console.log(out);
var a = [];
a[0] = [];
a[0][0] = "1";
a[0][1] = "2";
a[1] = [];
a[1][0] = "1";
a[1][1] = "2";
a[2] = [];
a[2][0] = "1";
a[2][1] = "2";
for (i = 0; i < a[i].length; i++) {
for (j = 0; j < a.length; j++) {
document.write(a[j][i]);
}
}
js很強大; 只需使用傳播運算符
mat = [[1,2,3],[3,4,5]] mat.forEach(v=>console.log(...v));
// output 運行代碼見 output。
1 2 3
3 4 5
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