javascript - 将数组的元素附加到字符串

Question

我有一个数组和一个字符串。当数组长度可能变化时，如何动态地将数组的每个元素添加到字符串中？

var array = ["123", "456"];

var str = 'Select * from abc where column_name IN (' + array [0] + ',' + array [1] + ')';

console.log(str);

Answer 1

在数组上使用 Array.join():

var array = ["123", "456", "789"];

var str = 'Select * from abc where column_name IN (' + array.join() + ')';

console.log(str);

您还可以使用 template literal 代替字符串连接:

var array = ["123", "456", "789"];

var str = `Select * from abc where column_name IN (${array.join()})`;

console.log(str);