试图防止将重复值添加到数组中. [英] Trying to prevent duplicate values to be added to an array.

问题描述

在单击事件上向数组添加重复值时，我的项目出现问题.

Having an issue with my project when it comes to adding a duplicate value to an array on a click event.

当我将点击的项目的值推送到数组 openedCards.push(card); 代码允许将多个项目值添加到数组中，从而使用单个项目创建匹配的值.

when I push the clicked item's value to the array openedCards.push(card); the code allows for multiple item values to be added to the array thus creating a matched value with a single item.

我尝试像这样包装这段代码 if ($.inArray(card,openCards) < 0)openedCards.push(card); 我看到不再添加匹配类匹配对，或与此相关的任何值.

I have tried wrapping this code like so if ($.inArray(card, openedCards) < 0)openedCards.push(card); i see that the match class is no longer being added to matching pairs, or any values for that matter.

这里是这里是jsfiddle

推荐答案

使用 vanilla javascript，您可以执行以下操作:

With vanilla javascript you can do this like the following:

if (array.indexOf(value) === -1) array.push(value);

其中 array 是您不想重复的 value 数组.

Where array is your array of value's that you don't want duplicates of.

或者，您可以使用以下 es6 语法:

Or, you can use the following es6 syntax:

if (array.includes(value) === false) array.push(value);

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