我需要用范围替换字符串示例:
string = "this is a string";//I need to replace index 0 to 3 whith another string Ex.:"that"
result = "that is a string";
但这需要是恐怖的.不能替换固定的单词......需要按范围
我试过了
result = string.replaceAt(0, 'that');
但这只取代了第一个角色而我想要第一个到第三个角色