"Uncaught TypeError: undefined is not a function", but this is not true. [Warning ProjectEuler: 4]

Question

我有一个 Javascript 函数可以进行大量计算（这不是我的主要问题；P）我正在尝试调用它，同时使用带有 onClick="" 属性两者都在代码中调用。

main.js :

var val;
var palindromes = [];

function count() {  
    for (var i = 100; i <= 999; i++) { //for loop multiplies all 3 digit values together
        for (var j = 100; j <= 999; j++) {
            val = j+i;
            var valString = val.toString();
            if (valString.splice(0,1) == valString.splice(5,6) || valString.splice(1,2) == valString.splice(4,5) || valString.splice(2,3) == valString.splice(3,4)) { // If statement to check for palindromes
                palindromes.push(valString);
            }
        }
    }
    console.log(arr.reduce(function(previous,current){ return previous > current ? previous:current })); // show me the largest palindrome!
}
count(); // here I am calling the function from the code

我的 HTML 页面：

<!DOCTYPE html>
<html>
<head>
    <title>Problem #4</title>
</head>
<body>
<script src="main.js"></script>

<button onclick="count()">Click Me!</button> <!-- This is my button that will call the function -->

</body>
</html>

再一次，我不是真的害怕代码有多糟糕，但更感兴趣的是为什么会出现这个错误：Uncaught TypeError: undefined is not a function (anonymous function) 我正在使用 Google Chrome 版本：39.0.2171.95（官方构建）m 和 Javascript：V8 3.29.88.17。不确定这是否有帮助或什么。提前致谢 ;).

PS：我也试过在脚本标签中添加代码，但这没有帮助

Answer 1

if (valString.splice(0,1) == valString.splice(5,6) || valString.splice(1,2) == valString.splice(4,5) || valString.splice(2,3) == valString.splice(3,4)) { // If statement to check for palindromes

字符串上没有 splice 方法，但数组上确实存在一种方法。

"Uncaught TypeError: undefined is not a function", but this is not true. [Warning ProjectEuler: 4]

"Uncaught TypeError: undefined is not a function", but this is not true. [Warning ProjectEuler: 4]

html

javascript

typeerror