数组的fill方法
JavaScript fill()方法 (JavaScript fill() method)
fill() method is used fill the array with a given value.
fill()方法用于使用给定值填充数组。
Syntax:
句法：
array.fill(value, [start_index], [end_index]);
Parameters:
参数：
value is a static value to be filled in the array.
value是要填充到数组中的静态值。
start_index is an optional parameter, it specifies the starting index to fill the array, its default value is 0.
start_index是一个可选参数，它指定填充数组的起始索引，其默认值为0。
end_index is also an optional parameter, it specifies the ending index to fill the array, its default value is array.length.
end_index也是一个可选参数，它指定填充数组的结束索引，其默认值为array.length 。
Return value: None
返回值：无
Example:
例：
Input:
var arr = [10, 20, 30, 40, 50];
Function call:
arr.fill(0);
Output:
0,0,0,0,0
JavaScript Code to demonstrate example of Array.fill() method
JavaScript代码演示Array.fill()方法的示例
<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
var arr = [10, 20, 30, 40, 50];
document.write("array elements: " + arr + "<br>");
//filling all elements
arr.fill(0);
document.write("array elements: " + arr + "<br>");
//filling initial 2 elements with 100
arr.fill(10, 0, 2);
document.write("array elements: " + arr + "<br>");
//filling next 3 elements with 200
arr.fill(200, 2, 5);
document.write("array elements: " + arr + "<br>");
</script>
</body>
</html>
Output
输出量
array elements: 10,20,30,40,50
array elements: 0,0,0,0,0
array elements: 10,10,0,0,0
array elements: 10,10,200,200,200
翻译自: https://www.includehelp.com/code-snippets/array-fill-method-with-example-in-javascript.aspx
数组的fill方法
