如何在函数内部创建一个数组可以在整个页面中使用

I have an array that is made inside of a function like this:

我有一个在这样的函数内部的数组：

function easy() {
    var colors = ["white", "red", "orange", "yellow", "green", "blue", "purple", "gray", "white", "red", "orange", "yellow", "green", "blue", "purple", "gray"];
}

I call this function through an onclick on a radio button, but when I do this later:

我通过点击单选按钮调用此功能，但是当我稍后执行此操作时：

colors.sort(function() {return 0.5 - Math.random()});

it doesn't work, I think it might be because colors is just a local array. Is there any way to make it work throuhttp://*.com/posts/21558099/editghout the whole page?

它不起作用，我认为这可能是因为颜色只是一个本地数组。有什么方法可以让它工作：//*.com/posts/21558099/editghout整个页面？

4 个解决方案

#1

If you declare your array outside of the function its scope is global :

如果在函数之外声明数组，则其范围是全局的：

var colors;
function easy() {
    colors = ["white", "red", "orange", "yellow", "green", "blue", "purple", "gray", "white", "red", "orange", "yellow", "green", "blue", "purple", "gray"];
}
easy(); // Here colors is defined;

#2

var colors;
function easy() {
   colors = ["white", "red", "orange", "yellow", "green", "blue", "purple", "gray", "white", "red", "orange", "yellow", "green", "blue", "purple", "gray"];
};
easy();
colors.sort(function() {return 0.5 - Math.random()});

#3

Are you looking to encapsulate it?

你想封装它吗？

var easy = {
   colors: ["white", "red", "orange", "yellow", "green", "blue", "purple", "gray", "white", "red", "orange", "yellow", "green", "blue", "purple", "gray"],
   hello: function() { alert("Hello") }
}

alert( easy.colors.sort(function() {return 0.5 - Math.random()}) );
easy.hello();

#4

-1

Probably you will need to use that variable in several programs. Put it in an external file, php an add it via include. Consider it like global variables.

可能你需要在几个程序中使用该变量。把它放在外部文件中，php通过include添加它。将其视为全局变量。

#1